Hi Pradeep,
Thank you for contacting the Microsoft Community.
I understand how important your exam is to you, therefore I'll make sure it's arranged properly. I'm here to provide the support you require to address your issue.
For me to verify your account and have a complete visual of your error, kindly provide us with the step-by-step screenshot using the Problem Steps Recorder (PSR) (click this link for MAC device). Begin from the login page and continue until the error occurs. Please upload the PSR file via the private message I have started, along with the information requested.
Please still include the basic troubleshooting steps while capturing the PSR before you schedule your exam to ensure that it is not a browser-related issue:
Make sure you have the updated Microsoft Edge and clear the browser cache and cookies.
Open an InPrivate or Incognito browser tab and accept and allow all third-party cookies.
Schedule an exam through Browse Credentials | Microsoft Learn and try to redo the exam registration again.
Once scheduled successfully, the registered exam would show up in your Learn Profile under Credentials tab then Certifications
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. Thank you.