Unable to load Marking Guide Templates

Covered by Behat tests.   For testing manually, you can follow these steps: Create a course Create an assignment activity In the assessment activity page, go "Advanced grading" setting from cog icon Choose "Marking guide" from the dropdown list for active grading method Click "Define new grading form from scratch" and create grading form by "Save marking guide and make it ready" button Click "Publish the form as a new template", and click "Continue" to create a new template Click "Delete the currently defined form", and click"Continue" to delete current form for the activity Click "Create new grading form from a template" Confirm there is no errors, and template which was made in previous step is shown