validate.perfdrive.com when trying to schedule and find the date for test

Hi Marjoko,

Thank you for contacting the Microsoft Community.

I appreciate you for trying to a different device to resolve the error. Let me direct you to the correct Support Team that can help you with eliminating the error and to directly schedule your exam.

Please be aware that I found that ShieldSquare, a Mitigation Bot that prohibits you from scheduling your exam through your dashboard. It must therefore be taken off your computer. With this, we request you to reach out to https://www.shieldsquare.com/contact/ and they will assist you to white-listing your IP post which you should be able to schedule the exam.

I also suggest reaching out to your exam delivery provider for immediate assistance in scheduling your exam as they have the ability to arrange your exam at your preferred time and date. Below are their contact details depending on your preferred exam provider:  

Should you need additional assistance, I have initiated a private message where you can send the requested information to help you with resolving your concern.

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,