Lovelace not loading

All was working fine. I was in Node-RED and then swapped to the file editor.

Node-RED works if I go to my-ip:1880
appdaemon dashboard works if I go to my-ip:5050

I’m running this from an image rather than installing over Raspbian (not sure of the terminology)

Now I just get the blue bar with a spinning icon in the title and it doesn’t do anything else.

I’ve tried deleting my cache.

Not sure what to try next apart from pulling the plug on the Pi so any ideas would be gratefully received.