Ok, so I did the Plex dance on 2 movies. One, which doesn't use a customer poster and one that does use a custom poster set in my collections config. The dance went smooth with no issues. I then ran the script and watched closely.
Here are my findings:
The non-custom movie poster received the overlays with no issue. The Plex Error: Plex Poster Download Failed error is gone for this movie.
OLD LOG:
Plex Error: Plex Poster Download Failed
10 Things I Hate About You | Overlays Applied: Rating1Fresh, Rating2Fresh
NEW LOG:
10 Things I Hate About You | Overlays Applied: Rating1Fresh, Rating2Fresh
For the one with the custom movie poster, the custom poster was applied successfully (failed previously) and the overlay was applied over the customer poster.
OLD LOG:
Movie: tt10665342 Details Update Not Needed
1 poster found:
Method: file_poster Poster: /config/assets/movie-posters/Halloween Ends (2022).png
Detail: poster update not needed
...
Halloween Ends | Overlays Applied: Rating1Rotten, Rating2Rotten
NEW LOG:
Movie: tt10665342 Details Update Not Needed
1 poster found:
Method: file_poster Poster: /config/assets/movie-posters/Halloween Ends (2022).png
Detail: file_poster updated poster to [File] /config/assets/movie-posters/Halloween Ends (2022).png
...
Halloween Ends | Overlays Applied: Rating1Rotten, Rating2Rotten
So the Plex Dance appears to have fixed things. The latest trace log is attached.
Now the question is, do I have to do the dance on all media? If yes, is it possible backup and restore my watched statuses and added dates for individuals who I share my Plex with?