I bought a new iMac and used Apple's Migration Assistant to migrate my old Mac Mini to the new iMac. I made sure that 1Password was up to date with all available beta updates. I can not get Safari 12.0.1 (14606.2.104.1.1) to work with 1 Password. When I press Command-\ nothing happens. When I click on the 1Password icon in the Safari toolbar, nothing happens. Everything seems to be working in Google Chrome on the same computer.
I uninstalled 1Password 7 beta by pressing Control-Option and clicking on 1Password and then on Quit 1Password Completely (I had to uncheck the Safari Extension in Safari Preferences first).
I downloaded and installed the latest version of 1Password 7 from your website and then checked for available beta updates. Still not working.
1Password Version: 7.2.3.BETA-2 (70203002)
Extension Version: 7.2.3.BETA-2
OS Version: 10.14.1 (18B75)
Sync Type: 1Password Membership