Plex upgrade to version 184.108.40.2069
There is a new version out since January 28, 2020
And plex has announced the following in the beginning of January:
Important information regarding TV artwork in Plex
On January 31st, one of the primary sources of TV artwork in your Plex library will be making a configuration change that will prevent any new TV shows added to libraries on older Plex Media Servers from getting artwork.
Starting January 31st, Plex Media Server version 1.18.2 or higher will be required to continue fetching TV show posters and episode thumbnails from TheTVDB.
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