Hello Karsten,
Please make sure that before scheduling your exam, there is no occurrence of any non-English letters on your profile and replace them with Roman alphabets (e.g. name, address).
Signs and symbols should also be removed from your profile as another workaround for these cases ( like., \ ! @ # - etc.).
You may update your profile by logging in to your Microsoft Certification Dashboard then click “Edit Certification profile”.
If you are getting the same outcome, please provide us a PSR (Problem Steps Recorder), starting from the sign in page until the error message is shown on your screen.
You may upload the PSR file through the private message I initiated along with the requested information.
To access your private message, please refer on the image below or click on this link.
I look forward to your response. Please note that if no response is received after two business days, the case will be closed and locked. After the case is locked, we will no longer be able to respond, even through Private Messages.
Regards,
