Roon does not recognize audio on my core computer

I have two computers on my network, a MacBook Air in my living room and a Mac desktop in my office. I first set things up using the office computer as my core and everything worked fine. I later switch so the living room MacAir is the core computer and everything initially worked fine. The next day my core computer sound output can not be seen my Roon. Yesterday I tinkered with it for several hours switching the core back a forth between the two computers without success. I finally closed Roon and Roon
Bridge and got the core computer to recognize the sound output of the Mac Air. Today I cannot get the Core computer to recognize the sound output of the core computer. It only shows the sound options on that it can see on my wifi network.

I suggest you open a ticket in the #support threads and fill in the info requested in a new topic