The game crashed whilst there was a severe problem during mod loading that has caused the game to fail
The game crashed whilst there was a severe problem during mod loading that has caused the game to fail
Error: net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Just Enough Items (jei)

How much ram do you have allocated? This issue might be better resolved using our discord #help-desk channel. https://discordapp.com/invite/FdFDVWb

I would recommend making sure you had 6GB of RAM allocated and download a fresh instance.

Sounds like an issue while downloading.