Private message window has vanished

Bees and Honey

This image says so much. Well, a couple of things
Jul 9, 2021
16
16
3
UK
I found this to be the case a couple of days ago. I have tried 2 browsers and checked they are up to date. When I try the messenger window, on PC or phone, the messenger window contains no profile name and has 2 tabs that say "private" and "Chatrooms"

I can use the chatroom as normal on its own page. Is this a glitch in my systems? or do i need to do something to upgrade or similar? Any help will be appreciated.