How make Subliminal work on docker?

I install Docker via LibreELEC repository, and do a docker pull diaoulael/subliminal to install.

Until then, okay. But after I do a docker run --rm --name subliminal diaoulael/subliminal download -p opensubtitles -l en Spider-Man\ Into\ the\ Spider-Verse\ \(2018\)\ WEBDL-1080p.mkv to download a subtitles, for exemple, and it show this

standard_init_linux.go:207: exec user process caused "exec format error"

How I can make it work? I’m a total noob in Docker, I installed this way because is it the only way I found to install it in LibreELEC. So I just install it with the first command, and did nothing more. I need to do something more to make it work? I don’t know how add my user/password in opensubtitles, for exemple.

[ratoaq2]

I tried locally and was able to successfully download the subtitle:

INFO:subliminal.core:Saving <LegendasTVSubtitle '5a5ab9b04f79b-the office s08e01 720p bluray x265 hevc-frogperson- the list.srt' [pt-BR]> to 'The Office (US) S08E01 720p BluRay x265 HEVC-FrogPerson- The List.pt-BR.srt'
Downloaded 1 subtitle

Try to clean the subliminal cache, since it might be conflicting with the cache from the previous release:

docker run --rm --name subliminal -v subliminal_cache:/usr/src/cache -v /var/media:/var/media -it dtroncy/rpi-subliminal cache --clear-subliminal

[ratoaq2]

Opensubtitles error is related to SSL (https connection), most likely the docker image has no certificates at all, and can’t validate any SSL connections. The legendastv is because unrar is not installed in the docker image as well.

So maybe, you could reach the image creator and ask about those 2