EDIT: I SOLVED THE PROBLEM! Is just the folder has some "weird" characters. Anyways, i'm not gonna delete this status, maybe a person would have this problem and could search the reason here.
This thing is the start of the problem tbh.
I said, when i use some effects (like IkPolishShader, RayCastShader, NCHLShader, etc) the model becomes invisible or black.
Someone knows how to fix that? bc i didn't find any solution to this.
EDIT: I added more screencaps, if they want understand the problem: