Headquarters Account Access Issue

I can’t login to my survey solutions headquarters account.
My account was made on 31st July 2025 and I was able to access it till 9th Sep 2025. But since last 1 day, the account isn’t working.
What could be the problem?

Headquarters user accounts are created by administrator users. To find out the reason for your account being disabled you need to contact the administrator user that has sent you the credentials you’ve used to access the server.