Forbidden message accordion activity Moodle
We are trying to create some H5P-activities in Moodle 3.3.1+. We tried making a accordion activity, but after adding the content and pressing on Save, we got an error (Forbidden. You don't have permission to access /course/modedit.php on this server.). It looks like a time-out, but that doesn't seem likely to us. The last changes we made also disappeared.
In this specific case we made an accordion-activity, but it also happened with other activities. Has anybody experienced the same? Is there a solution to this problem?