I should have read the fine print, I just assumed such a high-profile plug would be updated and work; my bad. I’ve lost several hours figuring this out.
It’s pretty concerning, this. ACF knew Gutenberg was coming and would ideally have had updates queued up when it released. Instead, it’s been a month+ of incompatibility post-Gutenberg release with no updates. Is this, in fact, a really big issue? Will it be updated and work soon? Will ACF remain viable?
Checking with my host to see about reverting back.