I am in Unity and I imported a new appodeal sdk and I get this error: Manifest merger failed with errors - unity3d

Question

1.Before I added the appodeal plug in everything was fine, but I also have unity ads and google services installed, so maybe that's part of the problem. I also removed the target sdk version from the manifest because I thought it will help but it didn't. This is the appodeal manifest :
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="27"/>
<application android:allowBackup="true" android:networkSecurityConfig="#xml/network_security_config"
android:name="androidx.multidex.MultiDexApplication">
<uses-library android:name="org.apache.http.legacy" android:required="false"/>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<!--optional-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<!--optional-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<!--optional-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!--optional-->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<!--optional-->
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
<!--optional-->
<uses-permission android:name="android.permission.VIBRATE"/>
<!--optional-->
[![enter image description here][1]][1]

Answer 1

I had the same error: Missing 'package' key attribute on element package at [:com.my.target.mytarget-sdk-5.11.7:] AndroidManifest.xml:15:9-54. But you posted the wrong manifest. The error is in a generated one, inside the cache folder of grandle.
But here is the fix:
Preparing your Gradle build for Android 11
You need to change classpath 'com.android.tools.build:gradle:3.4.0' to 'com.android.tools.build:gradle:3.4.3' in gradle file. (Unity 2017.4 - Unity 2019.4)
You need to change classpath 'com.android.tools.build:gradle:3.6.0' to 'com.android.tools.build:gradle:3.6.4' in gradle file. (Unity 2020.1)
For versions (Unity 2017.4 - Unity 2019.2) you can change gradle version in /Unity/Hub/Editor/UNITY_VERSION/PlaybackEngines/AndroidPlayer/Tools/GradleTemplates/mainTemplate.gradle or directly in mainTemplate.gradle in the project.
For versions (Unity 2019.3 - Unity 2020.1) you can change gradle version in /Unity/Hub/Editor/UNITY_VERSION/PlaybackEngines/AndroidPlayer/Tools/GradleTemplates/baseProjectTemplate.gradle or directly in baseProjectTemplate.gradle in the project.
This is from the Appodeal Documentation Docs