Plex Server can't find posters for some movies

Plex Media Server Metadata & Adding Files
1

Server Version#: 1.41.6.9685
Player Version#: 4.145.1

I added movies and for a few movies posters are missing. All metadata are present except posters. ‘Fix match’ finds correct movies, with correct metadata but without a poster. Checking the movies on the plex web site - I also do not see poster.
I use Plex Movie scanner and Plex Movie agent.

Here they are:
https://watch.plex.tv/en-GB/movie/breathless
https://watch.plex.tv/en-GB/movie/the-great-race
https://watch.plex.tv/en-GB/movie/le-magnifique

Could you please check whether the posters are missing?
What can I do to fix it?

2

These posters were most likely taken down due to a DMCA takedown order. In recent months, many posters which were originally created by one of the most famous poster artists were affected by this. Plex has to follow such an order on risk of litigation.

All you can do is to obtain the poster elsewhere and store it beside the video file as a JPG file, suitably named.
https://support.plex.tv/articles/200220677-local-media-assets-movies/