Ugh - So for whatever reason - a learner contacts you to say that they finished a training material but it was never marked as complete and they want to know if you can help because they cannot progress until that item is complete.
Hopefully this is useful for someone in this situation.
Begin by navigating to the course in question and hitting the enrollment tab and do a search for the learner.
At the end of the row for that learner are three dots that will only appear when you hover over them. Click on these three dots to reveal a little pop up menu. Select User Stats.
Next, find the offending training material and click on the status icon for it.
In the little pop-up that appears, choose the appropriate status from the dropdown.
Click the red checkmark to submit the change.
You should see the change.
Of course, now you need to dig deeper to find out why items are not being marked complete as they are supposed to.
Hopefully this helps someone today!