I tried mine, working as usual and my account status is still the same with how it was previously. I wonder of the error and account blocking only affect random accounts.
Seems like accounts with more than 1000$ are disabled
I've got about 500$ in my account. It was disabled 2 days ago. I've made an enhanced verification and account status has changed to "enhanced" but still disabled. Bittrex support still don't answer the ticket.