Invalid Sideboard Error When Deck Has 15 Cards
After trying multiple times to join a match with a Timeless ranked match with my deck it says error. The only method that works is to reduce my sideboard to seven cards. I thought traditional formats had 15 card sideboards. please help me fix this. Running windows 11 though steam client. Other decks allow 15 card sideboards exact same format. Its the deck labled Cori Hammer
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Cadanza, Anjanette
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