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@kennethjl

Try the following:
1. Quit 1Password completely from the menu bar.
2. Quit Safari.
3. Open 1Password and then the browser.

It sounds as if 1Password for Safari recently updated and there is a disconnection in the communications.

I would like to mention that Apple released macOS Ventura 13.6 recently and I would recommend updating when possible. The patch was for several exploits that had been actively used in the wild. iOS, and watchOS were also updated.

 Apple Support - Keep your Mac up to date, - Update your iPhone, iPad, or iPod touch, - Update your Apple Watch