Error when using 1Password in the browser: "Your session has expired."

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Thank you both for the replies. It does sound like you're running into a known issue that our developers are investigating. There are two ways to workaround the issue until a permanent fix is released:

1. Turn "Automatically lock 1Password" on when using 1Password in the browser.
2. Install the desktop app. You can set your auto-lock preferences there using this guide: How to set 1Password to lock automatically

Our investigation has narrowed the issue down to a bug with how the auto-lock feature in the 1Password browser extension works, if the extension is set to never lock then authentication fails and a new tab with a sign in page is opened (as you've noted).

If you turn on auto-lock for the browser extension then the issue shouldn't occur. Alternatively, when the desktop app is installed authentication is handled by the desktop app and not the browser extension which avoids the issue as well.

Let me know if both workarounds don't work for you. We're hoping to release a permanent fix as soon as possible.

-Dave

ref: dev/core/core#27669