Ok. On further investigation, I'm not entirely sure if it's my setup, or if this plugin just doesn't work. I see nothing in the logs, I see requests building on the self-hosted iframely server, but nothing is being rendered in the front end. I see the DIV created for iframely-link
but that's about it - nothing else - and nothing recorded in the console

I see traffic being generated and passed to https://media.sudonix.com/iframely
as below
-- [21-12-20 18:17:18]:19209 77.101.200.87 - Loading /iframely for https://content.sudonix.com/hardening-wordpress/
-- [21-12-20 18:17:28]:19209 77.101.200.87 - Loading /oembed for https://content.sudonix.com/hardening-wordpress/
-- [21-12-20 18:17:36]:19209 77.101.200.87 - Loading /iframely for https://content.sudonix.com/hardening-wordpress/
-- [21-12-20 18:17:59]:19209 162.55.215.60 - Loading /iframely for https://matomo.org/free-software
-- [21-12-20 18:17:59]:19209 162.55.215.60 - Loading /iframely for https://community.nodebb.org/post/84581
-- [21-12-20 18:17:59]:19209 162.55.215.60 - Loading /iframely for https://rapidapi.com/user/justoverclockl
-- [21-12-20 18:17:59]:19209 162.55.215.60 - Loading /iframely for https://community.nodebb.org/post/86022
-- [21-12-20 18:22:25]:19209 162.55.215.60 - Loading /iframely for https://fonts.google.com/specimen/Alfa+Slab+One
However, this is all that happens. Nothing else. Interestingly, I have access to another NodeBB forum running the same plugin. This worked fine until I removed the API key, inserted my self-hosted URL, then restarted. This didn't work either - I saw traffic building on my self-hosted server, but nothing being rendered on the other forum either. I put the old API key back, and now it doesn't work at all ?? Even a ./nodebb build
does nothing.
If I check a post here, it seems to work as expected

Notice the additional iframely-container
DIV that is missing on my forum.