Thanks John,
this specific error message may be a problem. Seems you were not logged and you tapped on top right user icon that should start login process, right? Error say, that Android system (Google Play services), had for some reason problem with your login. I've already prepared new version, so this error will remain in app, but thanks anyway.
Problem with "endless loop". Next version 3.30.0 will hopefully solve this (I was fighting with it for almost a day and I'm still not sure if it's solved, we will see).
Problem with stuck during zoom ... as I wrote, it needs more time. Anyway I at least did small improvement (that may help).
And ... new version 3.30.0 just uploading, uff.