Detecting which films were unable to be added to Plex

MP4 - 11
11 files missing…hmmmmm

First, make sure your Movies follow PRECISELY this guide:
https://support.plex.tv/articles/categories/your-media/

Then, Under ALL tabs in Shows and Movies - do this:

Move LMA to the bottom of the stack of active agents:
Red: where it was
Green: where it goes

Rescan, Refresh Metadata, or Plex Dance: