Help with Pyrolusitium-z

[Gastronely]

I just downloaded pyrlusitium-z texture pack, and the moment I start the game, it gives me this error message:
Script 'PokemonLoad' line 310: NoMethodError occured
undefined method 'width' for nil:NilClass

 

I know it has nothing to do with my save files, because it only happens when I replace my graphic's folder with the texture pack one.

 

Can someone help me, please?

 

 

Edit: Turns out I'm stupid. Instead of outright removing my own folder, I simply added pyrolusitium's one, and it worked perfectly