I appear to be logged in correctly, I can see my initials on the top right of each page. However, I cannot access any of my teams confluence pages - I get a message saying I don't have access despite my confluence admin insisting I have the same privileges as other team members who can access these pages.

To make this stranger, when I click on my initials in the top right i see the below which includes both the option to log in and to log out. Again, none of my colleagues see this, they see a regular set of profile options. If I click log in here, I get a 500 error, again I have attached this below
Logging out and back in has no effect. Can anyone help?