@Matthias42 Thanks for your feedback.
We took a look into the issue you reported and saw that you did not log with your UserCenter for the last 9 months, till today. Your password expired at that time, and you had to renew it.
As a security company, we take the security of our customer and partner accounts very seriously. We now require MFA on all UserCenter requirements to make sure user data is protected.
You can set one-time password to be sent via an SMS, or you can enroll in one of the popular authentication apps, such as Google Authenticator or others.
Most importantly, you can also choose the "remember me" option to avoid typing in your 1TP for every login.
I hope this addresses your concerns.