Run the same Material Forge flow inside UEFN
Use the UEFN-safe listener script, then send through the matching button below. Only one local listener should be active on 127.0.0.1:7842 at a time.
1.
Open UEFN and make sure Python tools are enabled for your editor session.
2.
Open the script modal below, copy the listener, then run it through Tools -> Execute Python Script.
3.
Keep the listener window running on 127.0.0.1:7842, then come back here and send the material.