Checking through your log extract, they key error you are getting here is the following:
Project contains multiple Game targets (VR_Anatomy_Lab, VR_Basic) but no DefaultGameTarget is set in [/Script/BuildSettings.BuildSettings] of DefaultEngine.ini
This means the engine is not being able to choose a proper target for Android, so it never generates the game file, and the whole process crashes with exit code 1.
The automation tool is probably seeing multiple targetts in your build, so the solution here would be to locate any files ending in “***.Target.cs” and rename, move, or delete them. This way, the engine will locate the correct target for your build, and packaging should work as intended.
For further details and methods to deal with this error, you can also check the related threads below, as well as a video example about it:
