Error building android

I am very frustrated now because I think I havent touched anything and now I am not able to test the game on my Android device anymore. Please I Need help. my log says i got a build Problem. I am not sure but i Thing i Need to Change something in the Project Settings. I now i have set up everything correctly with the Android sdk. here is tha log. testing on Windows works so it has to be something with Android setuplink text

BUILD FAILED
LogPlayLevel: C:\NVPACK\android-sdk-windows\tools\ant\build.xml:649: The following error occurred while executing this line:
LogPlayLevel: C:\NVPACK\android-sdk-windows\tools\ant\build.xml:694: null returned: 1

this is what i think causes the issue

I have the same problem and need an answer too!

Could you please upload your Android Manifest file? After looking at the text that you’ve linked, it seems that there is an invalid character in the manifest file.

LogPlayLevel: [mergemanifest] Manifest merger disabled. Using project manifest only.
LogPlayLevel:      [echo] Handling aidl files...
LogPlayLevel:      [aidl] Found 3 AIDL files.
LogPlayLevel:      [aidl] Compiling 3 AIDL files.
LogPlayLevel:      [echo] ----------
LogPlayLevel:      [echo] Handling RenderScript files...
LogPlayLevel:      [echo] ----------
LogPlayLevel:      [echo] Handling Resources...
LogPlayLevel:      [aapt] Generating resource IDs...
LogPlayLevel:      [aapt] C:\Users\A\Documents\Unreal Projects\TappyChicken\EZY\Intermediate\Android\APK\bin\AndroidManifest.xml:1: Tag <manifest> attribute package has invalid character '''.
LogPlayLevel: BUILD FAILED
LogPlayLevel: C:\NVPACK\android-sdk-windows\tools\ant\build.xml:649: The following error occurred while executing this line:
LogPlayLevel: C:\NVPACK\android-sdk-windows\tools\ant\build.xml:694: null returned: 1

This is located in the last few lines of the file that was uploaded, just above the automation tool running into an exception.

OK I kind of repaired it. I changed the Parameter in the Project Settings here:Project Settings-Android-Android Package Name. I was using the demo from Tappy chicken and wanted to overwrite it with my Settings. If you can follow my Train of thoughts, then could you explain me what I am supposed to enter in that field? I dont want to mess it up again. Thank you