Tabula Opacity Java Problem

I have been trying to import a model I made in tabula I can change the opacity in tabula and I can import it but when I try to use it and run a gradle I get this error 

C:\Users\Zachary\Desktop\mcreator\src\main\java\net\mcreator\test001\MCreatorAncientSlime.java:189: error: cannot find symbol
         GlStateManager.color(1.0F, 1.0F, 1.0F, 0.5F);
                       ^
  symbol:   method color(float,float,float,float)
  location: class GlStateManager
C:\Users\Zachary\Desktop\mcreator\src\main\java\net\mcreator\test001\MCreatorAncientSlime.java:194: error: cannot find symbol
         GlStateManager.color(1.0F, 1.0F, 1.0F, 0.5F);
                       ^
  symbol:   method color(float,float,float,float)
  location: class GlStateManager
C:\Users\Zachary\Desktop\mcreator\src\main\java\net\mcreator\test001\MCreatorAncientSlime.java:200: error: cannot find symbol
         GlStateManager.color(1.0F, 1.0F, 1.0F, 0.5F);
                       ^
  symbol:   method color(float,float,float,float)
  location: class GlStateManager
C:\Users\Zachary\Desktop\mcreator\src\main\java\net\mcreator\test001\MCreatorAncientSlime.java:205: error: cannot find symbol
         GlStateManager.color(1.0F, 1.0F, 1.0F, 0.5F);

It will work if I don't change the opacity but then even if the texture is transparent I cant see through it.