Lesson series are generated in the background. You will see your dialog will close near immediately, and a quick notice will flash over the course, telling you that the work has started.
Update Oct 2019 - this is back to the foregorund due go delays in starting up background jobs.
In a few seconds you should see an alert, telling you the work is complete, and your row will update automatically:
The alert has some important information:
- How many lessons were created
- Date of the end of the series
- A button to jump to the end of the series
- An x icon to dismiss the alert
Background generation helps with overall system performance, and is enabled for series creation and updates.