I'm in same boat as you... I have a Kraken Tier 4 verified account + business checking account. The names on both accounts match and all the documentation should be in order. I'm able to deposit BTC / sell BTC, but when I go to withdraw USD I receive the error "Failed" with no explanation.
I've opened tickets with support and tried escalating on Reddit / Bitcointalk but have not heard a single word from Kraken.
Let me know if you resolve it. I have never done a withdraw with Kraken but they verified all my details so it should work. I called my bank and they did not see an attempt to wire on their end.
Have you got it to work before?