Full error: Can’t sign in. LegacyServerError: Operation is not permitted.
Saw reference to this here too. I would submit as ticket but can't access my account to do that.
To clarify: this is bypassing all extensions and apps and going straight to website which seems like an account problem.
1Password Version: 1Password 7 1Password 7 Version 7.4.2.BETA-0 (70402000)
Extension Version: 1Password X Beta 1.17.6
OS Version: MacOS 10.15.1
Sync Type: 1Password.com