Mage deck error

New to Hearthstone and I’m getting an error while trying to use the Mage’s deck in practice. From what I can tell these are all basic cards.

I can’t post links yet, so just replace [dot] with an actual dot.

imgur[dot]com/a/Cyl1Mde

Thanks for the report! This is currently apart of our known issues that causes this error our team is aware of the issue and looking into this error.

Decks can show missing cards in the Collection Manager.
(Note: Editing the deck twice may help resolve this issue)

Going to go ahead and close this thread as a duplicate to this thread.