Hi @captain_yar , thank you very much for your help.
Effectively, when I merge all the block categories, it works.
Unfortunately, my goal is to have different categories for pages and posts. I use Gutenberg for building full width sections in pages, but want to use standard blocks (with a few customs) for posts.
Regarding your error, is it a javascript message?
By my side i have this kind of javascript error when i’m editing a post:
The block "core/quote" must have a registered category.
