When you summon the demon in Mistdread, the game looks for a file called $BigMonster2, but the file with the sprite is called $Eraf, here is the error message.

Unable to find file:

Graphics/Characters/BigMonster2 

And one more thing, the event where Azar tricks you into digging the ground for the money is bugged.  When you reach the end of the event it will restart where the last hole was dug so it's impossible to beat it rn.