Logic crashes when attempting to install the sound library helper tool

Logic Pro 11.1.2 keeps crashing when I authenticate the following message:

"Logic Pro needs to install a tool used to manage the Sound Library. Logic Pro is trying to install a new helper tool.

Enter your password to allow this."

I have tried another user account, deleting all sound library files, preference files, and even deleting Logic Pro, restarting and reinstalling it. It downloads the 20gb or so of samples, comes up with that alert, then crashes when I enter the password. Anyone else run into this?