Answered
After reinstall, Lightroom Classic app icon is blank in dock
Here's how it looks:

I've looked in its folder and the icon is there. I've uninstalled and reinstalled a couple of times with no luck.
Here's how it looks:

I've looked in its folder and the icon is there. I've uninstalled and reinstalled a couple of times with no luck.
I was able to fix it by following the instructions at this page:
How to clear icon cache on Mac
Already have an account? Login
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.