White Screen During Setup. Tried everything

I’m trying to set Magento up locally using MAMP, and I’m getting the WSOD. I’ve changed permissions, to the point that just about everything has full permissions, and still nothing

I’m running php 7.2, and I’ve been able to run composer install without any issues. When I check the network tab, I see the setup index.php come through with a 500 error.

my cgi.fix_pathinfo is set to 1, I have a db created in phpmyadmin with the same name as the root folder, and both the debug log and system log have 2 lines that say:

main.ERROR: Error: Application is not installed yet. [] []