Access denied- Certification exams Trados Studio 2022

Hello.

Good afternoon.

I have recently attempted to take the Level 1 exam for Trados Studio 2022 certification, however the system won't allow me to proceed.

As a matter of fact, the following error message keeps showing when I try to start the exam.

500 - Internal server error.

There is a problem with the resource you are looking for, and it cannot be displayed.

How can access to the exam?

Thanks in advance