core_reportbuilder_retrieve_report WS fails when the Course Enrolment status column is used

Login as admin. Go to "Site administration > Users > Add a new user" and create a new user. Go to "Site administration > Courses > Add a new course" and create a course. Enrol the user in the course as a student. Go to Site administration > Reports > Report builder > Custom reports. Click "New report". Set a Name and, in Report source, select "Course participants". Save changes. Copy the id you see in the URL of the page, you will need it later. E.g. the URL should be something like "YOURSITE/reportbuilder/edit.php?id=5". In the list at the left, click the option "Enrolment > Status". Check that the Status column has been added to the report. Go to the Audience tab and click "All users" at the left. Click Save changes. Create a Token for the student user:     Click on Site administration ► Plugins ► Web services ► Manage tokens Do a CURL request simulating a WS client, replacing wstoken with the student token, the reportid with the one you copied in step 8, and the site url with yours. curl 'http://localhost/m/stable_master/webservice/rest/server.php?moodlewsrestformat=json' --data 'wsfunction=core_reportbuilder_retrieve_report&reportid=5&page=0&perpage=20&wstoken=4fa679cba032a870004502b39c104583' --compressed | python -m "json.tool" Confirm you receive the report information, not an exception. E.g. you should be able to see the name of the report, the time it was created, etc.