Windows 11 Dev Channel: don't receiving an update

I am currently running the dev-channel of Windows 11, 22449.1000, it's almost outdated therefore I wish to update to a newer one, but I don't receive any updates in windows center, moreover I can't even change the channel through the buttons, they are unavailable for me. 

Windows update center states "An error found, Last check: today 1:04", and that never changes.
I don't wish to get a clean reinstallation, as I have a lot of files on this PC.