If I could have gotten remote debugging to work, it would have been easy to spot this. But that's weird it would load fine on a Wifi network, though not on a mobile network. https error should fire on both occasions.
Scrubforums loads fine (so no problem with Cloudflare), and it was the first time visiting the site on my phone (so no problem with cache), let alone using 4G to access it.
I need a favicon made for my website.
I won't post the link so as to not be considered advertising.
It's a personal site / resume site, and it has a blog (or, it will have a blog anyway)