Hello Nishit,
Thank you for contacting the Microsoft Community.
I understand that you are encountering an issue with the lab assessment. I can only imagine how inconvenient this is especially if you want to enhance your skills and earn credentials. Allow me to extend my assistance and provide information in order for you to proceed.
To ensure that the error you encounter is not due to browser related issue. Kindly perform some basic trouble shooting to access the lab assessment after the 72 hours cooldown.
1. Update your browser to the latest version.
2. Clear browser cache and cookies.
3. Restart your browser and launch an In Private or Incognito browser.
Should the issue persist, kindly provide a screenshot of the error you encountered along with the following details below:
· The Title of the Assessment
· Lab instance ID
· URL: Copy the entire URL of the problematic page and paste it in your response.
· Date/Time you encountered the issue
· Description: Explain the primary issue
I look forward to your response. Please note that if no response is received after three 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.
Best regards,