Moodle 3.3: You do not have permission to install content types.
We are implementing the H5P plugin into our Moodle installation (running on SLES/PHP7/Postgres). The installation has gone fine and the tool is available in our Moodle, but I am unable to install any content types (as an admin user). The GET button is grayed out and it tells me I do not have permissions to install content types.
I had this on our previous test install but can't remember how I fixed it! Is it a file permissions issue? If so, exactly which folder needs what permissions. I've tried everything up to 777 on /mod/hvp, but am not sure exactly where the content types are cached in /moodledata.
Help much appreciated!