BubbleUPnP and Pause/Next track

[jchoatejr]

I too am seeing the "Action Failed 501" error from BubbleUPnP. But not related to internet radio, or pause/next track. I have MinimServer 2 installed on a Synology NAS with about 100 tracks copied from CDs. I installed "Audiophile UPnP Renderer" on my PC as a music player. Using BubbleUPnP on my android phone I can browse the library on the NAS with MinimServer and I can see the Audiophile UPnP Renderer as a player. When I select a track to play the track name appears in the Audiophile UPnP Renderer window on my PC, but the "Action Failed 501" in BubbleUPnP is all that happens. I noticed that my TV's chromecast was showing up in BubbleUPnP as a renderer, when I selected that the track played through my TV. At first I suspected the Action Failed 501 message was coming from Audiophile UPnP Renderer, but evidently it shows up in BUbbleUPnP with other renderers as well, so I don't know where the error originates, or what causes it. Any suggestions would be appreciated.