oppo 93 and synology

[audio_elf]

Not sure if you got this sorted...

But as I read your post you are trying to control the Oppo 93's playback from Minimserver using BubbleUPnP on your android phone?

If so this isn't going to work - the Oppo 93 will playback from a UPnP server, but you have to use the Oppo's own interface to control the playback. You can't use a separate remote device.

Only the newer Oppo 103/105 have the facility to be controlled by separate control point software.

Hope this helps.
Eloise