Error shows in final submission

Today ,I face same error..

DSC is registered successfuly ,but during final submission i get the error  namely ''error occured"..please give suggestions.

Try after some time. It will definately work if DSC is successfully registered.

WHEN I ENTER OTP TO COMPLETE THE GST MIGRATION VERIFCATION THEN I CLICK TO VALIDATE. SYSTEM SHOWS SOMETHING WENT WRONG, PLEASE TRY AGAIN... THIS ERROR OCCURS FROM LAST 20 DAYS.. I CONTACT HELP DESK. THEY SAY SEND A SCREEN SHOT. I SEND MANY SCREEN SHOT TO HELP DESK. THEY REPLIED ME TRY AGIN. BUT NOTHING WORKS. PLEASE HELP IF U CAN.....THAT IS YOUR MOST KINDNESS. YOU CAN SEE IN VIDEO WHAT ERROR IS THIS..https://www.youtube.com/watch?v=IvKIPVXQ0yU

I AM ALREADY USE EVC.