The free apps for Android today are offered a lot on the Mod apk sites today. You can find them anywhere. BHCmod.com is one of them that you can look for

2020.1.0b5 and issue still persists (like once on three builds). Restarting Unity fixes the problem temporarily.

@SJWEESALS
I can confirm upgrading Unity to 2019.2.6 fixed this issue for me.

Although marked as fixed in 2019.2, this error occurs for me on 2019.2.5 (the latest build of 2019.2). The fullBackupContent fix still works.

I guess issues like these are why some people say you should never update Unity on an existing project?
I guess I should have listened.
Regretting not sticking to Unity 2017.
I miss the good old days when Substance actually worked inside of Unity and the app didn't crash on startup for 40% of devices...
Sure I got LWRP, but in the end was it worth it?

Community fix.
https://forum.unity.com/threads/unity-2019-x-il2cpp-crash-on-android-8.673972/page-2

Here is simple temporary fix from the mebers of community.
[QUOTE="TextusGames, post: 4827980, member: 1228963"]This simple 4 steps solution fixes my problem.

1. if someone interested there to create "res/xml/my_backup_rules.xml" file, your should make it in "Plugins/Android/"

2. Content of custom back up rules file:
[code=CSharp]<?xml version="1.0" encoding="utf-8"?>
<full-backup-content>
<include domain="sharedpref" path="."/>
</full-backup-content>[/code]

3. Android manifest should be copied in "Plugins/Android"

4. You should paste " android:fullBackupContent="[USER=94913]@XML[/USER]/my_backup_rules" " inside <application > tag
Example of Android manifest (you can just use this manifest):
[code=CSharp]<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.unity3d.player"
xmlns:tools="http://schemas.android.com/tools"
android:installLocation="preferExternal">
<supports-screens
android:smallScreens="true"
android:normalScreens="true"
android:largeScreens="true"
android:xlargeScreens="true"
android:anyDensity="true"/>

<application
android:theme="@style/UnityThemeSelector"
android:icon="@mipmap/app_icon"
android:label="@string/app_name"

android:fullBackupContent="@xml/my_backup_rules"

>

<activity android:name="com.unity3d.player.UnityPlayerActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data android:name="unityplayer.UnityActivity" android:value="true" />
</activity>

</application>
</manifest>
[/code]

Those 4 steps fixes back up crush.

In this solution only player preferences will be restored howewer you can include other files in custom back up rules.

Even more simple solution:

You can download archive with 2 files, extract it, copy files in respective folders and problem will go away. ( Copy AndroidManifest into "Plugins/Android/" and copy my_backup_rules into "Plugins/Android/res/xml/" )

Tested in Unity 2019.1.11 and Unity 2019.2.0f I think it will work in any unity version.[/QUOTE]

Turning off automatic backups by adding the following lines to the <application> element in our AndroidManifest seemed to work for us:
android:allowBackup="false" android:fullBackupContent="false"
tools:replace="android:allowBackup"

Wow, we didn't know about this issue before releasing an update and now we are getting so many emails from players who's game broke, OMG unity... This is terrible work.

Crash happens even if I change app bundle version number. That is bad, I can no longer update my app. (Unity 2019.1.11)