I just had this happen again, I added Solar Opposites S00E04.mkv
This is in a pre-existing folder structure where the main folder is Solar Opposites then Season 01 or Season 02. I added Season 00 with this episode in it. I tried the plex dance and it would not pull the title of the episode. I did what Sillvainplex suggested above, I changed the agent to the TVDB and it found it instantly. Now I have that pesky Upgrade Libraries notification.
What will happen if I allow the upgrade Libraries to run with TheTVDB listed as the agent like in this picture? I prefer the TVDB over I guess this new plex agent, that also uses TVDB, but doesn’t work? I’m honestly confused why this new plex agent exists if it just uses the same info as TheTVDB.