I encountered the same problem:
1. Enpass 6.5.2 (726)
2. In Enpass' settings the option for "Touch ID" is disabled with a comment below "Touch ID isn't enabled on this device.Learn more". The link isn't correct either, btw. (https://www.enpass.io/biometric-not-available/).
3. No other apps are showing problems with using the Touch bar on my MacBook Pro (16", 2019)