Few days ago I changed sign in process for Google+ and when submitted app to AppStore had such info:
Invalid Bundle - Info.plist of “Tic Tac Toe Firebase.app/GoogleSignIn.bundle” specifies a non-existent file for the CFBundleExecutable key...
Strange thing as downloaded newest version (2.2.0) from google. But finally found a solution, in XCode press Cmd + Shift + O and search box will open, type info.plist and you will see some results, open Info.plist from GoogleSignIn.bundle and find “Executable” entry, then just remove it (don’t leave it empty!). Now you can submit your app again, just remember to increase build number.