If you experience any crash, rendering that never completes or unexpected render visual, please first try in Blender directly.
If the problem persist when rendering in Blender then the problem is not related to BRQ.

If however it is rendering just fine, some third-party add-ons installed on your machine may not be properly designed to work in background mode when using BRQ and may crash. Please disable any unused add-ons and try again.

If the problem persists, please enable the rendering log (Settings panel > Monitoring > Screenshots & logs > Save Blender rendering logs), render again to reproduce the error then send me the render log file.

Please also join the main app log file (Settings panel > Advanced > Debug reports > View log file), a sample blend project that creates the error will also help me troubleshooting.