Schematica problem

[realNETOS813]

I was just wondering why my schematica is not working, every time i load a schematic so i can already build my minecraft crashes.
I know that blue point is on top and red is below but it still crashes, i've also done it with only a few blocks, but still.

 

[Monstererza]

Might be your Pc, the forge version or the lunatic craft. Try changing these can help.