1. Launched the mini-player with 'itunes' keyword
2. The application was unresponsive until I force quit it
2a. Upon 2nd attempt, a window briefly appeared after about 30 seconds showing it searching through genres, tracks, etc. but then Alfred was unresponsive again until I force quit it
2b. Upon 3rd attempt, a window showing what I assume is the mini-player (I am a brand-new user) appeared after about 60 seconds, but then the app freezes for another 60 seconds or so after any attempt to select an option here. Eventually I got a list of albums but I gave up.
Alfred 4.0.6 
macOS Catalina v10.15.1