Login Lightroom 6.0 not working anymore

Hi there,
I cannot login anymore with Lightroom 6.0. It worked until yesterday, I did not need to login for probably a year, and out of the sudden today I have been logged out. When clicking on Login now it promts that my browser might be outdated (which it isn't) and the Adobe Support won't help me because this version doesn't get support anymore. Does anybody know how it might work? (I'm on Windows 11)

Thanks a lot.