Podcast doesn't work

[WW-build]

After youtube-podcast-gateway setting up I'm able to subscribe to the podcast, cover of the podcast is loaded but there is no audio or video output in the Podcast client.

youtube-podcast-gateway Starting server on port 8080 ... [1]: Handling request for /playlist/PLCJjdqofvBsUJzotAzzXSxleSnjZpUCXp ... Requesting https://www.googleapis.com/youtube/v3/playlists?part=snippet&maxResults=50&id=PLCJjdqofvBsUJzotAzzXSxleSnjZpUCXp&alt=json ... Requesting https://www.googleapis.com/youtube/v3/channels?part=snippet&maxResults=50&id=UCXYRdIXDdeZIf816EWAr5zQ&alt=json ... Requesting https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=50&playlistId=PLCJjdqofvBsUJzotAzzXSxleSnjZpUCXp&alt=json ... Requesting https://www.googleapis.com/youtube/v3/videos?part=contentDetails%2Csnippet&maxResults=50&id=XIIP8eS3tvc%2C7OrLroFa0AI%2CEyBooxCkF3A%2CEObEoglaB5I%2Cqn5j0H9kQaM%2C1yYV9-KoSUM%2CWv3RpLvPasE%2Cmx8GA4jftVM%2Cfvc2IhSfA1o%2C24cCemVI1CY%2C6iYbcUUB_RY%2CgHe5cCorHQ4%2CjvoQkZOq0qU%2CIKPDP0_XUU8%2CWsmOmy05cds%2CFyO9fCtIwL8%2CItL6vcUrpUs%2CK8kAIg5sq4Q&alt=json ... [1]: Returned status 200.