I read those articles and whatever I could about this topic. The music was playing when I tried to connect the display, still just the word “Roon” on the display and I could not decipher the screenshots. Finally I found a youtube video that gave me the last piece of the puzzle, as to click on the loudspeaker icon and there on the display icon, that is only visible when an display in a browser is already waiting for data….
Anyway - I am happy it´s working -
and now it´s working everywhere even on my Xgimi projector.
maybe this info is useful for some newbie like me who struggles to activate the display function or it´s just me.