Hi, I have the same issue. I was working successfully last week with After Effects CC 2019 (16.1.1). However, I was tired of Bridge opening my PSD files with After Effects, so I reset Bridge (cmd + alt + shift when opening Bridge). Since then, After Effects CC 2019 isn't working anymore; playback with the spacebar doesn't work, nothing appears in the Composition panel, and After Effects freezes when I try to close a project. I restarted my MacBook Pro numerous times, I reset After Effects (cmd + alt + shift when opening), I uninstalled and reinstalled it, and it still doesn't work. I even created a new user, installed AE 2019, and I got the same problems... However, AE CC 2018 works fine. But that's too bad for my CC 2019 work, though, as AE CC 2019 just doesn't work. It was working fine last week!
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