Same happened to me again today. 2 cards disappeared, had to resubmit/build deck. Bug. Need refund

Wizard Class
Druid Class
Cosmos Elixir

I save my deck with the current Standard allowed version, yet the game loads the version that isn't allowed. I can swap them out and play immediately, but as soon as anything changes, the version retrieved from the server becomes the wrong one again.

Recebi dois decks novos e não consigo utilizá-los. Aparece um erro nas cartas que estão nos prints. As duas cartas não deixam eu utilizar os decks e o jogo impossibilita de tirá-las do deck.

I had the same thing happen to me. I closed the application and opened it back up and my DECK WAS REMOVED.

Happened to almost all of my decks, around 15.
I have to rebuild them, then they work.
WIZARDS: please solve this problem!

having same issue with almost all my decks....yup... ITS THE MIRAGE LANDS !!!

Having same problem with my Artifact deck

Same here with my deck white and black. I just reseted the lands and its working.

I had the same problem but when I took the mirage basic lands out it fixed the problem

Same here. All cards in the deck are standard

I had the same error. Changed my Basic Lands from Mirage to something else and it worked.

Your deck have basic lands of Palm tree symbol?

Ich can't play with my Jund Ember-Henge-Deck in any modi. The Deck is legal and the client show's this error: "Deck validation failed"