Error

The engine stopped while loading the model

The engine exited during loading, and the words after the exit code say why.

What it means

The engine started and then quit before the model finished loading. The message ends with the exit code and the engine's own last words, and those are the part that says what went wrong.

What to do

Still stuck

Settings → Data → Open log folder has the logs, and app.log is safe to share. Open an issue with the message you saw and that log, or read Troubleshooting.