Never met the first bug.
Alright i just dirty flash basic nick gapps?
I think you need to install it the non root way and install micro g through the vanced manager.
Are you on a recent corsicanu TWRP? are you skipping version? Have you tried again? Are you usually unlucky?
I have been using this app for like 5 years and it works well : https://play.google.com/store/apps/details?id=com.riteshsahu.SMSBackupRestore
*** Disclaimer I am not responsible for any damage you made to your device You have been warned