• 401 - Access Denied - Log-in credentials may have expired or no longer valid.  Possibly down for maintenance temporarily.  Try again later or create a support ticket.
• 403 - Forbidden - Try changing channels, updating the playlist, or clear cache and force close the app.
• 404 - Not Found - The source or URL no longer exists.
• 456 - Region Blocked - Stop using your VPN, or set VPN to different country.
• 504 - Timed Out - The server may be overloaded and the request timed out.
• DataSourceException, IllegalStateException, and ParserException - These are usually not from your end but from the providers end.  Try changing the channels and go back, update the playlist, or just wait and try back later.  If none of this helps, try using an external player.
• DecoderInitalizationException and Media CodecException -  Go to Settings/Playback, scroll down to Audio and Video Decorder, whatever you have it set at (Hardware or Software) change it and reboot your device.  Try an external player, or just wait and try again later.
• 406 - Not Acceptable - Server can't provide a response that matches the client's (your device) request for content.  This typically happens when the server doesn't support the requested format or the client is asking for something the server can't deliver.