Getting an invalid package error on Android 2.0.8.
FAQ
Q: Why won't the game run on mobile? Is there something wrong with the game? A: Most likely not if you can't get the project to run. Android has a built in security measure that prevents games 2gb or larger in size from running without certificate. To play via mobile try Joi Play (https://joiplay.cyou/) , if for some reason that doesn't work - try playing via PC. If you have managed to run the project and run into any other issues, visit the discord server to report your issue.
The answer to that question is that some people use Joi Play and still need the APK file to play the game. (Or any version of the game will work, the instructions above aren't suggesting you download the PC version, but rather use the android version with Joi Play - simple misunderstanding).
I'm sure you did your tinkering to arrive at the conclusion but - it has to due with Ren'py's inner workings and that's not really something I can fix.
However, explaining that to players does little to fix their problem, which is why I suggested Joi Play as a solution.