Exception error when parentKey is unset in episode metadata

[katekyonni]

Describe the issue
I opened an issue at another repo that is using Python-PlexAPI and they recommended I report this here.
This log should help figure out if this is a bug:
_plexanisync_logs 21-02-04.txt

Please check out the issue for more details: RickDB/PlexAniSync#47

Expected behavior
I'm using a different metadata provider (https://github.com/sachaw/anilist.bundle)
Error comes from its metadata creation however PlexAPI should handle it without breaking.

Enviroment (please complete the following information):

• OS: Ubuntu 20.04.2 LTS
• Plex version: 1.21.2.3943
• Python Version: 3.9.1
• PlexAPI version: 4.3.1

Additional context
RickDB/PlexAniSync#47

[JonnyWong16]

Do you have seasons hidden for the show in Plex?

That would be related to this Plex bug that never got addressed.
https://forums.plex.tv/t/parentratingkey-not-in-episode-xml-when-seasons-are-hidden/300553

[katekyonni]

Yes, I do have seasons hidden for the whole library. That's probably it.