Clicking Home Shows I'm Logged Off

[911Patches]

I am having issues with a couple of my coppermine installs.
After upgrading to 1.6.27 when I login and then click home it shows' I'm logged out.
Click login and it shows: Error You are already logged in!
Click any other link and it reverts back to showing I'm logged in.
Any idea what is happening?

https://www.patchgallery.com/bobbrooksfirepatches/index.php

[406man]

I've seen this many times and it's caused by caching, either in your web browser or at your web host. Press Ctrl and F5 together to display the most up to date version of the screen.

[911Patches]

Thank You!