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Play Store says "can't install this app try again, and if it still doesn't work, see common ways to fix it" after downloading is 100% complete

Play Store says "can't install this app try again, and if it still doesn't work, see common ways to fix it".
I have published UPDATE of my different android apps on play store and it got successfully live as usual. But the thing is that on my Google Play Console all apps' new install were ZERO from past 2,3 days.
Manifest AND Build Gradle: App are attached.
I WANT TO MENTION THAT THE APPS ARE BEING DOWNLOADED FOR 100%, then the below dialogue is displayed.
Message Shown on Each Apps Installation
Below is manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com...">
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-feature android:name="android.hardware.telephony" android:required="false" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />
<supports-screens
android:anyDensity="true"
android:largeScreens="true"
android:normalScreens="true"
android:resizeable="true"
android:smallScreens="true"
android:xlargeScreens="true" />
<application
android:allowBackup="true"
android:icon="#drawable/icon"
android:label="#string/ime_name"
android:largeHeap="true"
tools:replace="android:icon,android:label">
<activity
android:name="com...Main"
android:screenOrientation="unspecified"
android:label="#string/ime_name"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".PrefActivity"></activity>
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|
screenLayout|uiMode|screenSize|smallestScreenSize" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="#string/ads_application_id"/>
</application>
</manifest>
Build Gradle : App
apply plugin: 'com.android.application'
android {
compileSdkVersion 'android-R'
buildToolsVersion '29.0.2'
defaultConfig {
applicationId '...'
minSdkVersion 16
targetSdkVersion 29
versionCode 4
versionName '4.43'
}
lintOptions {
abortOnError false
}
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
androidTestImplementation 'junit:junit:4.13'
implementation project(':lib')
implementation project(':library')
implementation 'com.google.android.gms:play-services-ads:19.0.1'
implementation 'androidx.cardview:cardview:1.0.0'
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
}

I don't have answers for you, but would like to help you debug this issue. If you have a device that reproduces the problem, try connecting it to your ADB and reading through the error logs what is happening when you get this message. In my case it was something like:
Submitter: commit error message INSTALL_FAILED_UPDATE_INCOMPATIBLE:
Package signatures do not match previously
installed version; ignoring! Task Failed: tid:1000000026,
statusCode:6004
com.google.android.finsky.installerv2.InstallerException: Status: 6004
This made me conclude that there was nothing wrong with the update itself. I was just trying to update from the version that Google Play did not sign to the one signed by Google Play. Not to mention it was a false alarm as my users were not dealing with this issue at all.
Hope you guys find your error message and get to fix your problems!

App fails to launch on testing device with higher API

I have an android app that runs just fine on my testing device(API 17). However, when I run the same app on a device with a higher API(In this case 22) the app fails to launch.
All these devices are real devices not emulators
02/19 11:10:07: Launching app
$ adb shell am start -n "com.example.user.eafya/com.example.user.eafya.activities.FirstActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Error while executing: am start -n
"com.example.user.eafya/com.example.user.eafya.activities.FirstActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.example.user.eafya/.activities.FirstActivity }
Error type 3
Error: Activity class {com.example.user.eafya/com.example.user.eafya.activities.FirstActivity} does not exist.
Error while Launching activity
First activity is the launcher activity inside the manifest file.
Here is the build.gradle file
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.user.eafya"
minSdkVersion 17
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
resValue "string", "google_maps_key", (project.findProperty("GOOGLE_MAPS_API_KEY") ?: "")
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
implementation 'com.android.support:design:26.1.0'
compile 'com.android.support:cardview-v7:26.1.0'
compile 'com.android.support:recyclerview-v7:26.1.0'
compile 'com.android.support:multidex:1.0.1'
implementation 'com.android.support:support-v4:26.1.0'
compile 'com.google.android.gms:play-services:11.2.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
compile 'com.mikhaellopez:circularimageview:3.0.2'
compile 'de.hdodenhof:circleimageview:2.2.0'
compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
implementation files('libs/gson-2.8.2.jar')
implementation files('libs/okhttp-3.0.0-RC1.jar')
}
repositories {
mavenCentral()
}
apply plugin: 'kotlin-android-extensions'
The manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.user.eafya">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:name=".activities.AppController"
android:allowBackup="true"
android:icon="#drawable/logo"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".activities.MainActivity" />
<activity android:name=".activities.FirstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".activities.RegisterActivity"
android:label="Register" />
<activity
android:name=".activities.ClinicalHistory"
android:label="LOG IN" />
<activity
android:name=".activities.LoginActivity"
android:label="LOG IN" />
<activity android:name=".activities.AddAllergy" />
<activity
android:name=".activities.ClinicalHistoryDetailActivity"
android:label="LOG IN" />
<activity android:name=".activities.Appointments" />
<activity
android:name=".activities.Allergies"
android:label="#string/title_activity_allergies"
android:theme="#style/AppTheme.NoActionBar" />
<activity
android:name=".activities.MedicalTips"
android:label="News" />
<activity android:name=".activities.MedicalDetailActivity" />
<activity android:name=".activities.Wallet" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".activities.MapsActivityCurrentPlace"
android:label="#string/title_activity_maps" />
<activity android:name=".activities.AddChronics" />
<activity android:name=".activities.AllergyDetail"></activity>
</application>
</manifest>

Thanks all for the contribution. Here is what I found. I changed the launcher activity to another activity other than "FirstActivity" and that failed too but at least it gave me an error:
java.lang.RuntimeException: A TaskDescription's primary color should be opaque
After changing the primary colour(using the colour pallet located at colors.xml) to completely opaque, everything worked.
I had adjusted the transparecy of the primary and primaryDark and this seems to have been the issue.

I'm having white map with Could not find class 'android.app.AppOpsManager'

I've build mapActivity before and it worked perfectly and map appeared... I worked on other project to get a map but it didn't work.... I back to my first mapActivity project(which was working perfectly) and lunched again (after removing its map app from my phone) but it didn't worked and give me blank map
there are the erors:
1-Could not find class 'android.app.AppOpsManager', referenced from method com.google.android.gms.internal.zzro.zzg
2- Could not find class 'android.app.AppOpsManager', referenced from method rv.a
3- Authentication failed. Timeout while trying to contact the server.
and thid in Manifest:
<?xml version="1.0" encoding="utf-8"?>
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<permission
android:name="com.example.asus.myapplicationhello.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="com.example.asus.myapplicationhello.permission.MAPS_RECEIVE"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:name="android.support.multidex.MultiDexApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:largeHeap="true"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
and this is the gradle
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.1"
defaultConfig {
applicationId "com.example.asus.myapplicationhello"
minSdkVersion 16
targetSdkVersion 24
versionCode 1
versionName "1.0"
// Enabling multidex support.
multiDexEnabled true
}
dexOptions {
javaMaxHeapSize "4g"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.google.android.gms:play-services:9.4.0'
compile 'com.android.support:multidex:1.0.0'
}

app-release.apk showing "Parse error: There is a problm parsing application"

I have checked many answers but none of them helped
I am running it 5.1.1 android, and in build.gradle it is minSdkVersion as 15 so it should work.
I am able to run app-debug.apk on same device without any issue.
I have not renamed apk file after that, i have signed it for the first time manually in android studio.
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
defaultConfig {
applicationId "com.example.raghav.pokemonfinder"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
packagingOptions {
exclude 'META-INF/LICENSE'
exclude 'META-INF/LICENSE-FIREBASE.txt'
exclude 'META-INF/NOTICE'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.android.gms:play-services:9.0.2'
compile 'com.android.support:design:23.4.0'
apply plugin: 'com.google.gms.google-services'
compile 'com.firebase:firebase-client-android:2.4.0'
compile 'com.google.android.gms:play-services-location:9.0.2'
compile 'me.sargunvohra.lib:pokekotlin:2.2.3'
}
and here is my androidmanifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.raghav.pokemonfinder">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name="Utils.PokeMonFinder"
android:allowBackup="true"
android:icon="#drawable/icon2"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/MyMaterialTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".MapsActivity"
android:label="#string/title_activity_maps" />
<activity android:name=".MapsShowActivity" />
<activity
android:name=".SplashScreenActivity"
android:theme="#android:style/Theme.Light.NoTitleBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SubmitPokemon" />
<activity android:name=".PokemonDetailActivity" />
<activity
android:name=".HomeActivity"
android:label="#string/title_activity_home"
android:theme="#style/MyMaterialTheme" />
<activity android:name=".MyPokemonActivity" />
</application>
</manifest>

Android - Could not find class ClusterManager?

I added compile 'com.google.maps.android:android-maps-utils:0.4+' in may project :
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "24.0.1"
defaultConfig {
applicationId "com.ir.zanis.mycluster"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
vectorDrawables.useSupportLibrary = true
multiDexEnabled true
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.android.gms:play-services:9.2.1'
compile 'com.google.maps.android:android-maps-utils:0.4+'
}
But when I run app get me crash :
And here is my Manifest :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ir.zanis.mycluster">
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<permission
android:name="com.google.maps.android.utils.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.google.maps.android.utils.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="#string/google_maps_key" />
<activity
android:name=".ClusteringDemoActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
I've struggled for two days because of the problem .Thanks for your help

My problem solved :
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.google.android.gms:play-services-maps:9.2.1'
compile 'com.google.android.gms:play-services-places:9.2.1'
compile 'com.google.maps.android:android-maps-utils:0.4+'
}