My server config changes are not saving between restarts

If config changes are not persisting, the most likely cause is the game overwriting your file on shutdown.

For Minecraft: use the Server Properties page in the panel instead of editing server.properties directly; the panel writes the file at the right time in the shutdown sequence. Editing the file while the server is running risks the server overwriting your changes on shutdown.

For GMod: edit server.cfg while the server is stopped, or use the panel's configuration pages where available. The server writes some config on shutdown, which can overwrite manual changes if the timing is wrong.

For Rust: edit server.cfg while stopped. Rust also writes server settings on shutdown, so changes made while running may be overwritten.

If the File Manager returns an error when saving, check you have not reached your plan's storage limit; the Dashboard shows current disk usage.