So I tried creating a backup.
I can launch the backup wizard, select the drive I want to save the backup on, then I select "Let Windows decide" (I also tried selecting let me choose and selecting different folders, no difference), after that I get the "overview" but when I click on "Save settings and run backup". That's where the popup error appears saying "The System cannot find the file specified. (0x8007002)"
Clicking OK just closes the popup and the wizard.