Trying to fix my fixes led to a complete meltdown of the site, with all kinds of permissions screwed up.
Thankfully, the amazing folks at MacHighway responded promptly to my cry for help, and everything is up and running again. Wheew! – Thank you, MacHighway!! That is excellent customer service.
I shall now not even look at this site anymore in order not to break it.
Anyone else still wondering why this thing is called an “experiment”!?