These sort of issues can be tricky as there’s a few potential causes. When first flashed Ropieee can take some time before it’s available. We’re talking go make a cup of tea and drink it before checking long. If it’s gone AWOL for more than an hour it’s not working. In that case can you see the Pi device on your network outside of Roon?
Did you flash the card properly? Simply copying the bin file to the card won’t do the trick. You need image writing software as there’s a full Linux file system in there.
That’s the one. These conversations can be awkward, asking basic questions seems to question the others competence but in truth it’s avoiding assumptions. Your Ropieee endpoint does have its own web server and home page, http://ropieee.local/ or http://ropieeexl.local/ for XL. If that’s not available then Roons going to have issues.
The voice of common sense speaks. This is the sort of good advice I’m likely to miss. Am a Linux programmer and can miss some obvious options. This is easier than starting with network scanners,
Positive vibes
Next time plug in a screen it saves a lot of head scratching and is a little mini show all of its own as all the million little processes scroll past.
That’s great to hear @Barry_Joyce, now enjoy, you’ve earned it. Perhaps a coffee before you start listening, or depending on geography and time zone, something stronger.