Same for Vivaldi 2.1.1337.51 (Chromium 70.0.3538.113). Extension doesn't connect to the App anymore. What's strange is, the Beta Download page indicates the version of the Chrome Addon being 6.0.0.6, but the version on the Chrome Web Store still is 6.0.0.56. looks like there is something wrong on more than one level. Enpass 5 is bugged, Enpass 6 Beta now too.
I'll wait a few more days for a fix, if nothing comes, I'll switch to Bitwarden....