<em>Button isDefault prop is deprecated. Please use isSecondary instead.
[DOM] Found 2 elements with non-unique id #_wpnonce: (More info: https://goo.gl/9p2vKq) <input type="hidden" id="_wpnonce" name="_wpnonce" value="bfba76f940"> <input type="hidden" id="_wpnonce" name="_wpnonce" value="56fcd79998"></em>
Any idea how to fix this and have the blocks working again?
Good point, that part of the menu actually isn’t visible at all. The thee dotted menu is there, but nowhere to select between Visual editor or Code editor.
Anyway, I’ve found a way around the problem, which seems to be related to my particular admin user. It was created manually using this guide; https://wpengine.com/support/add-admin-user-phpmyadmin/ . So it seems this is missing something when it comes to Gutenberg. Added a new admin user for myself in the WordPress control panel and all is well with that new user.