not needed to be an error

src/main.rs

@@ -171,7 +171,7 @@ fn music(assets: Res<AudioAssets>, mut commands: Commands) {
 
 fn write_trenchbroom_config(server: Res<TrenchBroomServer>) {
     if let Err(e) = server.config.write_folder("trenchbroom/hedz") {
-        error!("Failed to write trenchbroom config: {}", e);
+        warn!("Failed to write trenchbroom config: {}", e);
     }
 }