Edit your library
Go to the ‘Add Folders’ tab
if in there is only a link to J:\TV Shows
then this is the problem.
You have those ‘index letter’ folders (J:\TV Shows\ S \Sesame Street)
Plex is very particular about the folder structure for tv shows.
These additional index-letter subfolders will upset the Plex tv show scanner.
They must either be removed or ‘made invisible’ to the scanner.
The latter can be achieved by adding each of those index-letter subfolders to the tv show library individually.
So that, after you are done, you have ~ 26 folders appearing on the ‘Add Folders’ tab, starting with J:\TV Shows\A up to J:\TV Shows\Z
