cannot sign into iCloud with Apple Id just loops
Hi,
I recently upgraded to Big Sur and it would keep asking for my apple id in preferences, so i signed out of iCloud and now i cannot log into iCloud, my Apple id and password work fine on all my other devices loads Apple tv, music etc. In preferences i click on use iCloud enter my ID then i enter my password and it then asks for my ID again and goes round again and again. I have reinstalled Big Sur today and it is still the same. Another side issue is Apple news will not load keeps on a loading loop. I would appreciate any help.
Thanks
Mac mini, macOS 11.6