For some reason the IMDB rating is not available for this movie. Don’t know if it is licensing, technical, or something else.
Look at Await Further Instructions (2018):
https://meta.plex.tv/m/4971408?lang=en&ratings=1&reviews=1&extras=1
It contains the line: imdb_ratings audience_score=“0” source=“imdb”
Even though the rating on imdb.com is 4.8.
Now look at Airplane! (1980):
https://meta.plex.tv/m/0080339?lang=en&ratings=1&reviews=1&extras=1
It contains the line: imdb_ratings audience_score=“78” source=“imdb”
7.8 is the rating on imdb.com and is what is shown in Plex.
I have a few other movies for which IMDB ratings are not available. Info in other threads says the Plex license for IMDB.com data only covers cinematic releases, so information on shorts & other such movies is not available to Plex. Some of the movies for which I do not have imdb.com data were cinematic releases, so there may be other licensing restrictions as well.
Some additional info:
