A quick firewall-cmd --zone=public --add-port=4567/tcp --permanent and firewall-cmd --reload later
And there we go.
Thanks @rbeer for the information about nodejs versions. I did not see the indicator that you did obviously.
Very nice! Glad to see it working now. 👍
And, don't you worry! I was tearing my hair out for about an hour, when I stumbled upon that error some weeks ago. 🙂