Yeah, I've been having this problem for a few days now (and still ongoing)... Glad to see it's not just me. D: I get this "Failed to save" error message every time I try to change the name. I dunno what's going on, but I thought it would be fixed by now (been happening since Tuesday for me).
I am unable to change the images I want to spotlight., or rather stand out alone in my page. Every time I do says there is an internal error and should try again later. In naïve fashion I do so and the same message pops up again. So you're not the only one. I was going to ask the same question. I hope this doesn't mean we HAVE to get a paid membership (Core) to be able to change them!