Hello, PIYUSH.
We are glad to have you in our Microsoft Community.
We understand that you are facing issues to access your Cloud Skills Challenge Microsoft Ignite Data Analyst certificate.
After doing some research, we found that there is another thread open regarding the same matter.
With that said, we will proceed with the closure of this Forum but please rest assured we will continue looking into the situation you are experiencing at the moment.
Please reference to that case win the following URL: Certificate not issued showing error - Training, Certification, and Program Support (microsoft.com)
Have a wonderful day,