Looks like this will be closed immediately, but hopefully will be useful to others searching
I'm getting a lot of these in the browser console and terminal:
{ statusCode: 404,
path: '/sockjs-node/info?t=1526125433512',
message: 'This page could not be found' }Turns out it can be solved by upgrading Node from 8.11.1 to 9.*
I'm guessing that the issue was with sockjs-node, but I don't know.