[13:48:44] [Server thread/ERROR] [minecraft/TileEntity]: Failed to load data for block entity minecraft:fission_controller
java.lang.NullPointerException: null
[13:48:44] [Server thread/ERROR] [FML]: A TileEntity minecraft:fission_controller(al132.alchemistry.tiles.TileFissionController) has thrown an exception during loading, its state cannot be restored. Report this to the mod author
java.lang.NullPointerException: null

This error appear sometimes in the Console. Don't know if it's when someone use it or not.

(Error appear on modpack Antimatter Energy)

Okay, Antimatter Chem has been updated to v0.4.15, this issue should be fixed now

This is already fixed in Alchemistry 1.0.1, I just haven't updated Antimatter Chemistry to use it yet. I will close this issue when I do