The studio cannot reach ComfyUI

1. 1ComfyUI is running: its own browser tab loads and shows the graph.
2. 2The address matches that tab exactly, including the port, for example 127.0.0.1:8188.
3. 3ComfyUI runs on a different computer? Start it with --listen so it accepts connections from your network, and use that computer’s local address.
4. 4A firewall or antivirus is not blocking the port.
5. 5Only one ComfyUI is using the port. Close extra copies and restart it.

Ask the Brain inside the studio: it reads the engine’s state and log and tells you what it found. Or post in the Discord with what the Engines page says.