Sensu Web UI Crash when trying to see checks

Hey all, After upgrading sensu to 6.5 i get this error message when trying to see check details\go to entities, or any other things except the list of events and dashboard.

I also noticed when upgrading from 6.5 to 6.6 (thought it will fix the issue) after runnign sensu-backend upgrade it asks to upgrade db from 5.* version to 6.* version (when sensu was version 6.5), and when clicking Y is says the db is already updated

We are working with 3 sensu-go backends and 1 postgresql RDS.

Screen Shot 2021-11-29 at 12.33.24

I can see this error in log when trying to check entities\checks:
Nov 29 11:03:47 {“component”:“apid.routers”,“errors”:[{“message”:“internal error: can’t scan into dest[5]: cannot scan null into *string”,“locations”:[{“line”:2,“column”:3}],“path”:[“resp”]}],“level”:“error”,“msg”:“error(s) occurred while executing GraphQL operation”,“time”:“2021-11-29T11:03:47Z”}