API Support for DLNA Streaming on Up2Stream AMP 2.1

I am working on a project involving the Up2Stream AMP 2.1 and would like to confirm its API capabilities for DLNA streaming from a NAS. My media library is hosted on Plex, my streaming server.

I aim to develop a web interface that allows users to play and shuffle songs. I have successfully sent API commands from a browser to initiate playback and received an “OK” response. However, the song does not actually start playing.

Could you clarify whether the Up2Stream AMP 2.1 fully supports API commands for DLNA playback? Are any specific configurations or requirements necessary to achieve this functionality?

TIA