You have a sorting tree that's crashing the server. last time I looked at that, it was experimental and had a huge disclaimer in NEI. (might be good now though)
It's possible someone placed an inventory it's not compatible with near it.
Block type: ID #2179 (tile.TFMagicLogSpecial // twilightforest.block.BlockTFMagicLogSpecial)
Block data value: 3 / 0x3 / 0b0011
Block location: World: (-221,79,333)
Take a backup of the server before you do anything, I can't guarantee this will fix it.
Download the world to your local PC and open it in McEdit. Delete the tree at -221 79 333.
Upload the world back onto the server and you should be good to go.