I've tried building a deck 3x and every time I finish I hit okay(DONE) and it shows 0/30 in my deck list

okay since i gave up yesterday i went back to edit deck and it said i had 44 of 40 cards, so i removed 4 and it shows i got 40/40 but not when i try to go duel i keep getting an error message saying

there was an error starting your game. please wait a few minutes and try again.


thiis is only happening with this deck as i can duel with others, whats going on??