I have MKV files generated by MakeMKV. When I specify the directory where they are located to the Edit Library dialog, Plex responds with “There are no items in this library.” The directory paths are correct, the MKV files are there. If I edit library after saving changes, it displays the paths to the directories with files. Is there a problem with MKV files? I thought MakeMKV was the tool to use with Plex. Are there more hoops to jump through? Thanks in advance.