Onedrive not saving word changes

Hi. So for the past few weeks I've had this banner at the top of word.

Translates to: LOGON REQUIRED We can't upload or download your changes, as your saved identification information have expired.

When I log in again it disappears for a moment, and then reappears. At first it didn't cause any trouble, but now my changes to my word documents are literally not being saved. Even with "Save on PC as standard on.

I have tried logging out and in again, both on word and onedrive, and uninstalled onedrive and reinstalled it again. No luck.