This mornign I reinstalled windows and noticed that GX doesnt sync as it usually works. So checked my work PC and I wasnt logged in there. When I did so I got the same error there as well.

When I follow Sync here it navigates me to:

Where everything seems to be fine. My Opera account seems to have the data saved there, it just doesnt want to sync

@robde Do you think a previous versions will fix it? You can export bookmarks from Menu -> Bookmarks -> Export and quickly move them to another version
Edit 1.
Where do you download previous versions from?

This mornign I reinstalled windows and noticed that GX doesnt sync as it usually works. So checked my work PC and I wasnt logged in there. When I did so I got the same error there as well.

When I follow Sync here it navigates me to:

Where everything seems to be fine. My Opera account seems to have the data saved there, it just doesnt want to sync