Guias
Minecraft Mods Not Loading? Fix a Modded Server That Won't Start
A modded server that will not start almost always has one of three problems: a mod is missing a library it needs, a client-only mod was put on the server, or a mod was made for another loader or version. Mods run on Kingdom plans with Fabric, Forge or NeoForge.
Add mods the right way
- Open your world and go to Mods, then pick the Mods tab.
- Search Modrinth, or paste a Modrinth or CurseForge link. Results match your server's loader and version.
- Add the mods you want, then click Apply to server. The server restarts once.
- Wait until it shows Online before you start or stop it again.
Missing libraries
Most Fabric mods need Fabric API. Many content mods need a library mod too, for example Architectury, Moonlight or Kiwi. If one is missing, Fabric quits during Starting. The real error is in the world log, and the panel may show it as a boot error. Add the missing mod, or remove the mod that needs it, then press Start.
Client-only mods crash the server
Minimaps, shaders, zoom and HUD mods run only on the player's game. On the server they crash it. Remove them in Files → mods.
Loader and version must match
A Forge mod does not load on Fabric, and a 1.20.1 mod does not load on 1.21. Check your server's loader and version on Software.
Give players the same mods
Players need the same mods on their own game. On Mods, use Download for your game to get a ZIP of every .jar. Unzip it into the mods folder of a launcher with the same loader and version, then join.
Mods and modpacks run on Kingdom. Compare plans on the plans page.