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Tickwise
ErrorPluginsSIG-PL-004

Plugin crashed while enabling (Error occurred while enabling)

Platforms
Paper · Purpur · single server
Verified
Verified
Confidence
Confidence 90%

What it looks like in the log

Any one of these lines is enough. The agent matches them locally, on your server.

logs/latest.log
  • [ERROR] while enabling

Symptoms

  • The plugin is loaded but disabled (red in /plugins); its commands and features do not work
  • In the log: “Error occurred while enabling <plugin> (Is it up to date?)” and a stack trace

Cause

The plugin's onEnable method threw an exception and Paper disabled the plugin. The stack trace (Caused by) shows the specific reason: version incompatibility, an unreachable database, a broken config.

Possible causes

  • The plugin version is incompatible with the server version (NoSuchMethodError/NoClassDefFoundError in the trace)
  • An external resource is unavailable: database, web API, port (SQLException/ConnectException in the trace)
  • An error in the plugin config (YAML/a value of the wrong type in the trace)
  • A plugin bug or a conflict with another plugin

How to fixLow risk

  1. Read the first line of the exception and the last Caused by: line in the evidence — that is the real cause.
  2. NoSuchMethodError/NoClassDefFoundError/ClassNotFoundException — update the plugin to a version that supports your server version.
  3. Database/network connection errors — check the address, port and service availability in the plugin config.
  4. YAML/config errors — fix the indicated file in plugins/<plugin>/ (or keep a copy and let the plugin regenerate the config).
  5. Restart the server (not /reload); if the error persists, report it to the plugin author with the full trace.

Translated from the Russian original; log lines are quoted verbatim.

Sources