Says 'There was an issue scheduling your exam ...... Contact Support' but the link has no contact details!!!!!!!!!!!!!!!
Exam AZ-400. Scheduling this with Pearson Vue with a voucher from Microsoft Cloud Skills Challenge
URL: https://examregistration.microsoft.com/?locale=en-us&examcode=AZ-400&examname=Exam%20AZ-400:%20Designing%20and%20Implementing%20Microsoft%20DevOps%20Solutions&returnToLearningUrl=https%3A%2F%2Fdocs.microsoft.com%2Flearn%2Fcertifications%2Fexams%2Faz-400
( suport link goes to: https://learn.microsoft.com/en-us/certifications/help#contact-support )