Node-RED Dashboard not loading - socket.io.js not found

[torrmundi]

I have a RPI3 with Lysmarine's BBN OS (Ubuntu) loaded. Signalk Server is working, and the embedded Node-RED admin web page is working.

When I try to view the Node-RED dashboard at http://localhost:3000/plugins/signalk-node-red/redApi/ui/ it fails, showing only a blank page.

The Chrome browser Inspect Console tab shows: Failed to load resource: the server responded with a status of 404 (Not Found) - http://localhost:3000/plugins/signalk-node-red/redapi/ui/socket.io/socket.io.js

I located the socket.io.js file at /.signalk/node_modules/.pnpm/[email protected][email protected][email protected]/node_modules/socket.io/client-dist/socket.io.js.

Can someone tell me why Node-RED is failing to load this resource, and what to do?