I think I solved the problem.
Apparently something went corrupted in my Roon Core (Rock). I solved it by deleting all files in the cache folder following the procedure in “Step 3” below.
Step 1: Force a Manual Library Sync
Before trying anything invasive, force Roon to actively scan your Qobuz account: [1, 2]
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Open your Roon Remote app.
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Go to Settings → Services.
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Click Edit next to Qobuz.
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Click Sync library now (or Sync Now).
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Go back to your Playlists tab to check if they have populated. [1, 2, 3, 4]
Step 2: Clear the Authentication Token (If Sync Fails)
If a manual sync doesn’t pull them down, Roon’s current cloud token might be stuck. Logging out completely severs the link and forces Roon to fetch your full Qobuz profile from scratch upon logging back in: [1, 2]
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Reboot your ROCK machine: Go to Settings → Setup → Find your Core (or access the ROCK Web UI via your browser) and select Restart Roon Server. [1]
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Once ROCK comes back online, open Roon, return to Services, and Sign In with your Qobuz credentials. Your playlists will begin downloading instantly. [1]
Step 3: Clear the ROCK Server Cache (The “Nuclear” Option)
If playlists are still missing due to a corrupted local cache database on your ROCK drive, you can wipe the temporary cache folder safely. [1]
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Open the ROCK Web Interface by typing your ROCK’s IP address into a web browser.
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Click Stop next to Roon Server Software.
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On a Mac or Windows PC connected to the same network, open your file explorer and access your ROCK network share (Type
\\ROCK\in Windows Explorer orsmb://rock.localin Mac Finder). -
Navigate to the
Data/RoonServer/Cachefolder. -
Delete everything inside the
Cachefolder (Do not delete the parent folder itself). -
Return to the ROCK Web Interface and click Start next to Roon Server Software. [1, 2, 3]
When Roon reboots, it will connect to Qobuz fresh, completely bypassing any old local data blocks, and re-import all your playlists cleanly. [1, 2]