I have the same problem.
After I enabled the Gutenberg editor I see blank page on: wp-admin/edit.php
My posts aren′t shown.
Even if I open a link to edit some post, I see this error:
TypeError: Cannot read property ‘core/paragraph’ of undefined at zn (https://DOMAIN/wp-includes/js/dist/editor.min.js?ver=9.0.11:55:45280) at https://DOMAIN/wp-includes/js/dist/editor.min.js?ver=9.0.11:55:46071 at Array.map
Versions installed:
Wordpress: 5.1.1–pt_BR
Gutenberg: 5.3.0
