Save button is missing

The save button does not appear on the basic page interface. This is not a fault of this module. I checked without this module as well, and I have also attached a screenshot.

I am experiencing the same since the last drupal core update. Seems to be a gin issue, see https://www.drupal.org/project/gin/issues/3460150 🐛 Save button missing when using the Gutenberg/Mercury editor module Fixed - but the merge request there does not apply anymore.

Installing gin 4.0.x-dev solves the problem for me.