The Rust compiler-in-use error usually means an update, plugin compile, or file operation is still running or has become stuck. Avoid repeatedly starting the same task while the compiler is busy.
- Wait a few minutes, then try the action again.
- Open Web Console and check whether plugins are still compiling.
- Restart the server if the process appears stuck.
- Run Steam Update again after the restart.
- If the error keeps returning, stop the server and submit a support ticket with the latest Web Console output.
Do not repeatedly start update jobs while one is already running.
