I just had the same problem. I transferred a fair amount of XTZ to Kraken, to have some would be ready to trade if the price increased. The price increased yesterday, and when I logged in, I received a "Account Disabled" message.

I am tier 4 verified.

Opened a ticket (ticket 2626651). Got a "we are looking into it" message but nothing else.

If the price falls before I can sell, I am done with Kraken.