upgrade to macOS 12.7, safari extension 8.10.46 does not work

Recent upgrade of macOS to 12.7.6. Safari 15.6.1. 1Password for safari extension 8.10.46.34
Extension icon on browser locked. Going to settings on extension takes you to blank safari tab/page.
Solutions tried 1) deleted safari extension, empty bin, reinstalled new - no change. 2) cleared history - no change.
Any advice on solution would be most welcome. RS


1Password Version: Mac 8.10.44
Extension Version: 8.10.46.34
OS Version: macOS 12.7.6.
Browser: Safari 15.6.1

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