This has been bugging me for a while, but whenever I download forge for specifically 1.12.2, it loads in the forge once I press play, then it goes back to the launcher once it is done.
It said in the launcher :
The game crashed whilst initializing gameError: java.lang.IllegalAccessError: tried to access method net.minecraft.util.ResourceLocation.func_177516_a(Ljava/lang/String;)[Ljava/lang/String; from class net.minecraft.client.shader.ShaderManager
Version
1.12.2-forge1.12.2-14.23.4.2725
and I believe this is the file that the crash report was at.
crash-2018-06-27_16.24.48-client.txt