Is there possibly a solution that doesn't include a mod? We don't want a mod to be the first answer if there's something else.
If fixing this is just replacing the ccmerged.package, then it's not a modification because it's replacing a package created by the game that sometimes isn't created right. I think the matter of the ccmerged.package was agreed on not being a mod in the MultiTab 6000 thread. It was established that whether you download one that works right or do a factory reset and make your game regenerate it, it still works. Joria noted
here that she was able to get exactly the same results by regenerating her ccmerged.package file as everyone who used the other method did. It's not a mod because all mods must alter some component of EA Standard gameplay.
However, the store fixes that Chuckles linked to are a mod. I suspect that they are the only way to solve the blackjack missing resource bugs without reinstalling Store content. I would try doing a factory reset, reinstalling Lucky Palms and seeing if the white box goes away. Failing that, a total reinstall may be the only option. If I knew the cause I could probably be of more help, but I've never actually had missing resources in my game.