Game won't load (steam)

Unknown

So, I started MPQ on steam and got this pop-up:


I clicked it away and decided to go and look over here if I can find some similar experiences. Then I tried it again and now this warning wont even load. All I get is the normal "preparing to launch marvel puzzle quest" pop-up which I get every time I start the game. Except the game is not loading.

I never used mpq on a device other than my laptop.

/edit: the game is working again after I slept over it.