Direct answer

Plugin settings usually live under plugins/<PluginName>/ but their actual format and location depend on the plugin. Invalid YAML or settings unsupported by that version may be ignored or cause startup errors.

Recommended procedure

  1. Stop the server and copy the plugin directory before making changes, including databases and generated files where appropriate.
  2. Read the plugin’s version-matched configuration reference and identify boolean values, list indentation, quoting and any required dependencies.
  3. Edit one setting, preserve the existing indentation style and save with UTF-8 encoding unless the plugin specifies something else.
  4. Restart the server and inspect the plugin’s startup messages; compare the effective behavior with the requested change.

What to do next

If a value is rewritten or reset, look for deprecation, a generated default or a plugin that owns that setting. Do not keep adding guesses from another Minecraft version.

How to verify the result

Check permissions and plugin commands from a player account, then record the known-good configuration version.

Version and compatibility notes

Not every plugin uses YAML, and some support live reload while others require full restarts. Secrets in config files should never be pasted into public support tickets.

Official references

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