I know this topic has been beaten to death but my Samsung S8+ and my Macbook do not show my Denon avr-s720w receiver. It worked up unitl yesterday! However, the receiver shows up on my wife's iPhone and she is able to play music through it.
Steps I have taken:
cleared cache from app
Re-installed the app on my S8+
logged into the app through my wifes account (Premium Family account) - still did not see receiver