Out of nowhere, every time I clicked on a Gutenberg block on a draft post (my Quarterly Inventory post) I’m getting “This block has encountered an error and cannot be previewed.”
The solution is (apparently) to disable every plugin – oh hey looky there: the error went away – and re-enable them one-by-one.
Yay.
I’d so rather being doing this than making progress on how to update a WordPress site URL after cloning in Proxmox. Not.
AND OF COURSE, NOTHING WAS WRONG
Grrr. I’ve now re-enabled every plugin, and Gutenberg is fine.
Apparently, the code base on WordPress is so good that one just needs to disable every plugin and re-enable them once in a while.