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NolimitHost

Troubleshoot Java Plugin Errors

Last updated: August 14, 2026

Fix missing dependencies, incompatible Java plugins, invalid configuration, and plugin startup failures on your NolimitHost Minecraft server. Start with the first error that names the plugin — most plugin failures come from unsupported server software, a missing dependency, an incompatible Minecraft or Java version, or an invalid configuration.

Identify the Failure

Open the Game Panel console during startup and compare the message with these common causes:

Console message or symptomLikely causeNext check
UnknownDependencyException or unknown dependencyA required plugin is missingInstall the dependency and a version compatible with the server.
InvalidPluginExceptionWrong file, damaged download, or incompatible plugin buildDownload the correct server plugin from its official source.
UnsupportedClassVersionErrorThe plugin requires a newer Java runtimeCheck the plugin requirements and selected Minecraft server version.
NoClassDefFoundErrorMissing dependency or incompatible APIFind the first plugin named before the stack trace repeats.
Plugin is ignored or does not appearServer software does not support it, or the file is not in /pluginsConfirm the server uses compatible plugin software and the file is a .jar.
Configuration parsing errorInvalid YAML, JSON, or another config formatRestore the last working config and reapply one change.

Fix One Plugin at a Time

  1. Stop the server — Leave the server stopped while changing plugin files.
  2. Create a backup — Follow the Backup guide and download the plugin configuration when it contains important data.
  3. Verify compatibility — Confirm the plugin supports the Minecraft version, server software, and Java runtime used by the server. Install every dependency listed by the author.
  4. Replace or isolate the file — Replace an invalid .jar with the correct release. To test removal, move the suspected plugin outside /plugins rather than deleting its data folder.
  5. Start once and read the result — Watch the complete startup. If another error appears, diagnose that new first error before changing more plugins.
Warning: Avoid /reload when diagnosing plugins. Restart the server so plugins load through a clean startup sequence.

For installation steps, see the Install Plugins guide. If the server still won't start, follow the Troubleshoot a Server That Will Not Start guide.