Can't create new or edit existing smart playlists

Updated MacOS to Mojave 10.14.4 Beta and now iTunes (12.9.4.61) will not allow me to:


1) edit the rules of an existing smart playlist

2) create a new smart playlist and save new rules

3) duplicate an existing smart playlist and then edit those rules (it allows the dupe, and lets me change the name of the playlist, but won't let me add or edit a new rule or delete an existing one)


Here's a screenshot. I've attempted to change the existing rule, but the OK button does nothing. It's not just taking a long time: it literally does nothing. It "presses," but doesn't save changes. Cancel is my only working option.


I've restarted iTunes numerous times, allowing several minutes to pass. Nothing.

I've restarted the laptop a number of times as well. Ditto.




It will allow MUSIC and MOVIE smart playlists, but will NOT allow podcast, audiobook, or TV Shows.