For me it's a Brawl Deck with Kona, Rescue Bestie as commander. Card is not marked red for not having or any other error. But when being done with editing the deck the error "invalid deck: contains card not in your collection" as long as Kona is in the deck i get the issue

Invalid Deck: Android: Every deck I have edited today 1/12/26 has been labeled invalid. It wont let me change any formats . It gives no reason or issue for why the decks are invalid.

Just in case the photos don't post.

I have the same issue in historic. Ive checked my historic deck as well and it says it contains errors when I go to save (it says it contains the following errors, and then nothing is listed. There's an error message on the deck but it says 0 cards are invalid. I've also manually scrolled through the deck and don't see any invalid cards. I actually played a match this morning no problem with that deck but then went to add a new card and now am experience this issue.

Here

I'm getting this as invalid deck, I tried every mode and none will let my try it

Hello Friends, I have a problem with Arena. It's happened several times, so i need to discover what's happening.

I was playing a tournament and I have to use the Direct Challenge. After choosing Pioneer (which is the tournament format) and picking my deck, the Arena show this: "Invalid deck. Deck validation failed." I'm attaching images. It's important to note that this is the same deck I use for ranking, and I have no problem there. I don't understand what's happening. Please help.

Thank you.