After login, any left menu item requires login again, and again

With our club,, we have the same issue
This is a problem for all members who have tried, not just for me
Club 4198747 - Brakethrough Speakers

At least one of members can login and access the agenda, and I am able to with my iPhone as well, but not from my Windows laptop,

Clear your browser cache and try again.

Cleared everything. Went to my company tech support team and they ran an advanced clear of all browser cache etc. Still the same issue. Appears to have started with the latest Microsoft Windows 11 security update that occurred on Sep 24.  Not all members of my club were affected. I'll try to see why mine doesn't work and someone else's does. I suspect you will start seeing this for more than the two clubs that have reported this issue. So once I diagnose the problem and solve it I'll post to this thread.

Make sure your browser is accepting cookies. and if you have a custom domain you will need to accept 3rd party cookies.

1. browser is accepting cookies.
2. accepting 3rd party cookies.
3. all cache and browser history is cleared.

One thing I noticed is that the pop up on the first time signing in asking for permission to use cookies does not appear. Can you provide what setting can affect that?