When a track is missing from a playlist, it correctly gives a warning but stops (& checked with F12). Ideally, it should skip that entry and continue on.
With regard to this message
Quote:Do not exit this page. Press F12 and go to Console to monitor progress or problems if you suspect things have gone wrong.
Have already suggested F12 should be PC only, not for mobile phone.
Since the process runs in the background, a user can exit page at any time. However the "do not exit this page" suggest otherwise. Maybe it should be changed to "If you want to check progress on your computer, do not exit this page".