For any podcast I select in Language Reactor, the transcription appears and a message “loading translations” next to each subtitle. After a few minutes, the “loading translations” message goes away, but no translations are loaded.
I am sure I checked on all the tabs of the documentation that can be found here : Language Reactor.
Thanks for your help 
Hey man, i had the same issue as you and many other users in this forum have mentioned the same issue. The devs said they are in the process of fixing it. But for now, this is what i do as a workaround to this issue.
If you’re on a mac, open iMovie, create a new project, and import the audio file and any random photo in it. Now expand the photo for the entire timeline of the audio. This will basically give you the audio in a video format with a static picture. Export the file in an mp4 format. Now, when you upload this into the media player, it will recognize this as a normal video and transcribe it.
I believe you can do the same thing with any video editing softwares if you’re on a windows computer. At first i tried simply changing the file format from mp3 to mp4 but it did not work. You have to convert the audio into an actual video