My server console shows errors: how do I read them?

Errors in the Console page are usually self-describing. Read the full line around the error, not just the error type.

"Failed to load" means a missing file or broken dependency; the name before it tells you which addon or plugin to investigate.

"Out of memory" means the server needs more RAM for its current load.

"Permission denied" is a file permissions issue in the server directory; try re-uploading the affected file via File Manager.

For GMod, Lua errors include a file path and line number. Open that file in File Manager, go to the line, and look for the issue. Common causes: a nil value being accessed, a missing function from a dependency that was not installed.

For Minecraft, plugin errors usually name the plugin and the method that threw the exception. If the stack trace says "ClassNotFoundException", the plugin may not be compatible with your server JAR version.

Copy the exact error message and search for it alongside your game name for community solutions.