Everybody pls read tge following. Problem solved. Moreover check john wus twitter. Its already fixed. Update coming soon. So please stop asking the same questions over and over again, use the search Funktion of this thread!
So the bypass method is actually very simple, open Magisk, go to its settings and select the option to hide Magisk Manager.
At the moment this has zero side effects, as normally it would break the Safety Net check in Magisk Manager but that's currently broken anyway so no loss
EDIT: The download/restoration process also creates a Magisk Manager folder on the SD card, that might also be the cause. Best to do both hide the app then delete the folder.