When I click the extension icon or hit the keyboard shortcut (Cmd /) I can select a login, but when I click to fill, the dialog closes and nothing happens.
However, in the console I can see that the extension's injected.js errors:
1Password Version: 1Password 7 Version 7.2.2 (70202006) Agile Webwink
Extension Version: 7.2.2
OS Version: 10.14 (18A391)
Sync Type: 1Password Family