I made a small mod with MCreator to use in my server, however, it doesn't work on the server. The server has other mods on it that work fine, but my mod specifically just doesn't work; I can't place the new blocks, and the setblock commamd doesn't list my blocks anywhere either. The mod and server are for Forge 1.16.4. The mod works in singleplayer worlds. What could cause this to happen?