I would try once more just installing the 5.7.1 version of the mod over your current install, but otherwise I'd guess that your current install is corrupted in some way.I'm not using the play store version been using platinmods version after I found this site which was sometime last year or two. I know the basic info when using play store to delete that to use the cheated version learned all that last year. So not sure why the app updates up crashes the game when trying to enter the game. Also will mention it was crashing when I did try getting on but I figured that would been bc it needed a update which is where I'm at now. So I can delete the platinmods version without losing any progress and reinstall it to see if that will fix the problem? I think I got off android around October. I know I was doing Halloween event, had to take a break from it.
I had a problem a while back on my second account where the game became very laggy all of a sudden, so I uninstalled the game completely and reinstalled it from scratch and my account continued to work alright after that, so hopefully a full uninstall-reinstall would work for you as well.
Please note that I was actually linked to facebook on that account. I didn't need to reenter my details as the account still worked automatically after reinstalling, but it is safer to have some method of recovering your account.