Hello Madhu,
The error was actually coming only for few UAR requests.
GRC production system was Down due to maintainance activities and after it was Up and running , they were facing some Browser related issues. And at the same time, the approvers had approved the UAR requests and so the requests were facing the errors.
Same has been communicated to the client.
The issue is closed.
THank you for your help ..!
Regards,
Rahul Muni