Lesson content missing from dashboard

I edited a large number of my lessons from the ‘Public’ to ‘Private’ status. Since refreshing the lesson dashboard page, they are now all disappeared. They are not located in any of the tabs either e.g. Trash, unassigned, preview, no preview. They are simply missing from my admin view (I know you cannot access via the website page permilink). I need to gain access to the edit pages in the future to switch back from private to public. I did not delete them, so there should be no reason why LearnPress has removed them from my view. Help please!