Question type Drag and drop into text undefined notice for gap in question and answer slot

Create a course. Go to the question bank. Click Add a new question link. Select Drag and drop into text. Fill in the form: Question name: Test question Question text: The [ [1] ] sat on the [ [3] ]. Choice 1 Answer: cat Choice 2 Answer: [leave this blank/empty] Choice 3 Answer: mat Click Save changes. Choose the 'Preview' action for the question. Verify the question displays without errors, and you can get it right. Close the preview tab. Choose the 'Edit question' action for the question. Verify that the question now has question text: The [ [1] ] sat on the [ [2] ]. Verify lower down the form, the two choices are now in spaces 1 and 2. Repeat these steps with the 'Select missing words' question type. (You can start at step 3.)