I get an unexpected crash error message on forge please help

[Telusufus]

This is the error message: 
The game crashed whilst rendering overlay Error: java.lang.IllegalAccessError: failed to access class net.minecraft.client.renderer.block.model.ItemModelGenerator$SpanFacing from class net.mehvahdjukaar.modelfix.ModelFix (net.minecraft.client.renderer.block.model.ItemModelGenerator$SpanFacing is in module [email protected] of loader 'TRANSFORMER' @46e190ed; net.mehvahdjukaar.modelfix.ModelFix is in module [email protected] of loader 'TRANSFORMER' @46e190ed)

[Choonster]