Synology DSM 7 won't accept file format, says invalid contact packet provider?

The Plex Media Server for Synology’s DSM 7 is currently available in a preview version (kind of matching that DSM 7 is still in beta).

There’s a dedicated preview thread with the download links for that platform as well as detailed instructions on pitfalls / issues / considerations. Keep in mind this is a preview… not yet a stable release!