Emoji doesn't work - running "Update Files" from ACP results in "connection refused"
After installing NodeBB I've been trying to configure Emoji. I've installed nodebb-plugin-emoji-extended and nodebb-plugin-emoji-one through the admin interface and have also activated them. But in the front-end the smiley selection button above the messages box does not appear.
I've tried running "Update Files" in the ACP, which doesn't seem to be working. Popping up the console, I see various errors stating "GET http://18.104.22.168:4567/socket.io/?EIO=3&transport=polling&t=LYgu_ke net::ERR_CONNECTION_REFUSED" (from acp.min.js?v=a114ca78-1b00-48b4-8cb1-6d5fb06836f3:5).
Help would be much appreciated.