Well, my feeling (when, this morning, I tried by installing an apk editor from google play) was that all the unpack, change and repack was already done and only the final sign was missing... so I assumed it was easy, but yes, I didn't dive into... Ok, it is interesting to find the root cause, and of course I'll do that next days, I just wanted to have an app with working gdrive integration on google play in the meantime... but there is no critical user in my case 😉 lol lol fine, thank you all