I can see a failure here
01-09 20:49:50.938 i: [EventSource (LocalServer)] Message: {"ClientDownloadEventNotification":{"uuid":"d65a291deac71aa642e34e9403dde5cc78be7daa","url":"https://192-168-2-100.3f6fe221d8e446d88a14e99215f183ad.plex.direct:32400/library/parts/194728/1586217377/file.mkv?download=1&X-Plex-Token=...v"}}
01-09 20:49:50.953 i: [DownloadQueueManager] Queue has started
01-09 20:49:50.953 i: [DownloadServiceHandler] New state is Downloading
01-09 20:49:50.960 i: [DownloadQueueManager] Downloading item to path /data/user/0/com.plexapp.android/Plex Media Server/Sync/1/3/.grab/d65a291deac71aa642e34e9403dde5cc78be7daa-local/Sicario (2015).mkv
01-09 20:49:51.060 e: [Downloader] Exception downloading /data/user/0/com.plexapp.android/Plex Media Server/Sync/1/3/.grab/d65a291deac71aa642e34e9403dde5cc78be7daa-local/Sicario (2015).mkv
01-09 20:49:51.061 i: [DownloadQueueManager] Download failed: d65a291deac71aa642e34e9403dde5cc78be7daa
01-09 20:49:51.061 e: An exception occurred: java.io.IOException: Unsuccessful response: 0
01-09 20:49:51.062 e: Stacktrace: java.io.IOException: Unsuccessful response: 0
This has been identified as may arise when there is DNS Rebinding Protection on the local network
Please see [BUG] Download errors on Android App - Plex Players - Plex Forum
