Errors when playing video via Alexa



I've had issues connecting Alexa to my server which have been rectified by installing a certificate on the server. Alexa now sees my players and pulls information from the server. She can play music from Plex on her own speaker. When I try to run video on any player (my default is an NVIDIA Shield) she just says 'ohoh something went wrong'.

Would you be able to look at the logs to see what the issue is please so I can attempt to troubleshoot?