The first thing about modding a client or server is when your adding a mod that expands another mod just check whether or not the versions are compatible
what version of minecraft? Because 1.13 Broke a lot of mechanics for items, blocks and entities.
I have not had a lot of time to have a look myself to check whats changed. So if its 1.13 then your going to need to ask a person
then me sorry I've only just go back to coding mods 2 days ago the last version i coded was 1.8 sorry.