It won’t let me play was my 3 unholy DK deck in standard matches, my paladin deck works fine but when i try my DK it say they try again in a minute message
Delete the deck and rebuild it.
If I understand the recent patch notes correctly, Blizzard have corrected a past mistake. When Death Knight released, people were accidentally given golden copies of all Core cards in addition to the plain copies, instead of getting plain copies only and gradually earning golden copies as they level up the class.
“Correcting” that mistake means, I assume, removing golden cards that players have not earned yet.
I assume that is the reason for your issue. You have probably used golden copies of cards in your deck, that you now no longer own. If you remove those and put plain copies in instead, (or if you level up the class until you earn the golden version), then I hope your deck will work again.
I can’t que with any Death kinght deck! Why?