Hi @Abhishek Dewan! I've deleted the app and data off my Mac Book air several times and tried to sync with the same results. I just tried to do what you suggested and I'm still having the issue on my M1 Mac Book air. My iPhone and Mac mini sync fine.
I'm using Enpass version 6.7.3 (888) downloaded from the Apple App Store. (See screenshot)
As I stated above this issue is only affecting my M1 Mac Book Air and not my Mac mini or my iPhone. I'm on Mac OS 12.0.1 (see screenshot)