So it works fine on Survivial, but when I try it on my server (in creative) whenever I place it, it just disappears. On Modrinth, it says Client and Server. Do I have to install a plugin on the server?

I'm also having this issue. Mod loads fine in Singleplayer, does not load in Multiplayer server.

Tested 1.1.3-fabric-mc1.19.4 on personal modded server on my machine.

Fair nough, but the mod is in a bunch of servers and it works fine for them, there is no such thing as making it not server sided, so you guys probably did something wrong with the install, anyway point is opening a bug report and saying X is not working without doing much as providing a server log means I literally I'm unable to help in any way whatsoever

Closing due to inactivity, you need to use a Fabric server to run Fabric mods, and a Forge server to play with Forge mods, content mods like mine need to be on both sides.