When launching 1.12.2 of forge it go though it's normal loading, but then when it gets to lava_flow it fails and says
The game crashed whilst initializing game Error: net.minecraft.client.renderer.StitcherException: Unable to fit: minecraft:blocks/lava_flow - size: 32x32 - Maybe try a lowerresolution resourcepack? Exit Code: -1
which lava_flow should be a normal block so there should be no problem while the resolution of the version is 1980 x 1080 right?
So why is it not working and who do I fix it.