In addition, make sure that physical stackup also matches to the fabricator capabilities.
In addition, make sure that physical stackup also matches to the fabricator capabilities.

beast start --port 8000 command? If you have, and it still fails, you should contact the author of the netbeast Node-RED they provide their contact information in the node's readme fileNodeJS code. The Author of the Netbeast node can only tell us more about this. But I don't think this issue is from Node-RED