critical

Wrong file for this server type

Q: What does "org.bukkit.plugin.InvalidDescriptionException: Jar does not contain plugin.yml" mean?

Wrong file for this server type. A mod was placed in the plugins folder, or a plugin in the mods folder. Plugins go in /plugins (Paper, Spigot); mods go in /mods (Forge, Fabric). Move the file to the right folder.

What it looks like in your log

org.bukkit.plugin.InvalidDescriptionException: Jar does not contain plugin.yml

What causes it

A mod was placed in the plugins folder, or a plugin in the mods folder.

How to fix it

Plugins go in /plugins (Paper, Spigot); mods go in /mods (Forge, Fabric). Move the file to the right folder.

Not sure this is your problem? Paste your log and Roastd will tell you which of these it actually matched, and what else it found.

Check your own log

Errors that travel with this one

A plugin is missing another plugin it depends onorg.bukkit.plugin.UnknownDependencyException: Unknown/missing dependency plugins: [Vault]
A plugin failed to loadCould not load 'plugins/MyPlugin.jar' in folder 'plugins'
A plugin was built for a newer server versionorg.bukkit.plugin.InvalidPluginException: Unsupported API version 1.21
A plugin needs a newer Java than the server runsCould not load 'plugins/MyPlugin.jar' in folder 'plugins': java.lang.UnsupportedClassVersionError: class file version 65.0
A file in the plugins folder is not a pluginorg.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
Two copies of the same plugin are installedAmbiguous plugin name `Essentials' for files `plugins/Essentials.jar' and `plugins/EssentialsX.jar'