items not showing up when put on server

[CraftyCrow5600]

I can put this in single player and everything works, the moment I put this on a server for me and another person, everything loses its values and cannot place items. in the logs it shows the following error:

[14:42:28] [Render thread/WARN]:Ignoring ingredient that isn't on the server: 1 air owmii.powah.item.BatteryItem nbt:{}

this is for each item in the mod.

I have everything needed for it to run. Any Ideas on what we can do to get it working?