Blocks Broke After Upgrade

I just upgraded from 2.0.8 to 2.2.4, and I’m having trouble adding blocks to the home page. When I add a block and save it, it displays in the admin with the title and a red x. There’s no way to edit the block. I can re-arrange the block, but I can’t change it’s settings otherwise. I’m trying to add a welcome message and a featured products section.

have you checked if it is enabled for edit in the ALL PAGES tab too?