shadowofnight03

I'm currently running a server with mohist (forge 1.12.2 latest release) and minecraft wont acknowledge modded item ids. At first I thought it was a problem with World Edit but the command /give won't recognize a modded item and give an item id not found error. For example when I use /give user chisel:sandstoneyellow1 it will say sandstoneyellow1 not found. Same for if I use it's id 4300, or its name + the id + the metadata. Anyone know what could be causing this?