[Fermé] Gutenberg block style missing

Background of the issue:
I am trying to: I can see from the developer console in my browser that there are missing styles for the Gutenberg blocks. Link to a page where the issue can be seen: lien caché. I expected to see: On the default language the form looks good: lien caché. Instead, I got: But on the Spanish page (and every other language) the columns are too small: lien caché

Symptoms:
Missing styles for Gutenberg blocks on translated pages, resulting in columns being too small.

Questions:
Why are the styles for Gutenberg blocks missing on the translated pages?
How can I fix the column size issue on the Spanish and other translated pages?