"Save" button is missing

UPDATE: After trial and error I chose not to "combine CSS files" and "Join Javascript files" and it started to work but only if I use administration theme to edit content.

I am having the same problem with a Drupal 9 implementation.

If I login as administrator then everything works well. If I log in as another role with permission to use Gutenberg, the hmtl around the save button is completely missing. Comparing the rendered hmtl, I see that a complete div class="gutenberg-header-settings" which contains the save button is missing from the non-administrator role.

I have not had the time to investigate further,

I cured the problem: any role using Gutenberg needs to have the "View the administration theme" permission enabled. But I do not understand why this has to be.

Faab900, did you go to "Configuration - > Performance" and disable "Aggregate CSS files and Javascript files" ?

FWIW: I experienced this on a fresh 10.0.7 minimal install, including not being able to set a title on the page. Turned out I hadn't ticked the box "use admin theme for adding / editing content" below the admin theme setting. As Gutenberg pretty much takes over the admin theme this wasn't obvious to see first.

I have the same issue clean d10 install with just this module installed and Claro as the admin theme.

There have been a number of issues with Drupal Core and CSS/JS aggregation. For anyone with the symptoms described here, start by disabling CSS and JS aggregation.

As of 8 Sept 2023, a patch was added to Gutenberg to sidestep this by disabling the aggregation of Gutenberg JS: https://www.drupal.org/project/gutenberg/issues/3372307#comment-15222909 🐛 Javascript Errors in Drupal 10.1 Fixed

Suggest trying with the dev release to see if it resolves the issue.