Every morning when I return to my mac and try to login somewhere on Safari, the Enpass extension reports it needs to "find" Enpass. A look at the dock at that point shows that the main app has mysteriously terminated during the night. The extension is successful in launching the app. Even after that however the extension cannot connect to the app: every attempt to login pops a new Safari tab, a search for the app, the app window appearing and getting minimized again, and the same "cannot find" failure from the extension. This happens every day now.
Extension 6.9.0 on Safari 17.0 with Enpass 6.9.1 on macOS Sonoma 14.0 (so, yeah, everything up-to-date.)