UE4 AR package error 4.19.2

Hi i try to package android project (ETC2) and i done it but when i install in the phone i got a “No Google Play Store Key”. I updated android SDK, accept license, after i make on “Package game data inside .apk” and i got the error:

UATHelper: Packaging (Android (ETC2)): :app:validateSigningDebug
UATHelper: Packaging (Android (ETC2)): :app:packageDebug FAILED
UATHelper: Packaging (Android (ETC2)): FAILURE: Build failed with an exception.
UATHelper: Packaging (Android (ETC2)): * What went wrong:
UATHelper: Packaging (Android (ETC2)): Execution failed for task ‘:app:packageDebug’.
UATHelper: Packaging (Android (ETC2)): > Java heap space
UATHelper: Packaging (Android (ETC2)): * Try:
UATHelper: Packaging (Android (ETC2)): Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
UATHelper: Packaging (Android (ETC2)): BUILD FAILED
UATHelper: Packaging (Android (ETC2)): Total time: 1 mins 26.996 secs
UATHelper: Packaging (Android (ETC2)): ERROR: cmd.exe failed with args /c “D:\UE4_Projects\AR_GameGestureManager_AR_Car6\Intermediate/Android/APK\gradle\rungradle.bat” :app:assembleDebug
UATHelper: Packaging (Android (ETC2)): (see C:\Users\Dima\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+UE4+UE_4.19\UAT_Log.txt for full exception trace)
UATHelper: Packaging (Android (ETC2)): AutomationTool exiting with ExitCode=1 (Error_Unknown)
UATHelper: Packaging (Android (ETC2)): BUILD FAILED
PackagingResults: Error: Unknown Error
Full log information in the txt file.
If some one know how to fix this please write because i don’t know how to create AR android apk without error “No Google Play Store Key”. And without this last error.

Hi, I´ve been traying to export Handheld AR project demo, but all the time i have problems packaging it.

I note meny people have some similar problem.

All help is well come.

Thanks