Google authenticator iOS app crash / fails to load after iOS 14.2 update
You have to reinstall the application without deleting it:
- Go to Settings > iPhone Storage
- Find Authenticator
- Tap "Offload App"
- After the process tap "Re-install App"
This provides to remove and install the application part, not your data/tokens. Your data remains.
I tried and succeeded on iPhone XS iOS 14.2.