PHP returning 500 HTTP Error on a parked domain

The setup I have a Laravel application running on my primary domain, mainapp.com . The Laravel public/ folder is symlinked to a subfolder in the document root, and a custom .htaccess routes everything through it. I was in the process of consolidating several separately-deployed instances of the same app into one, using Hostinger's parked domain feature so all domains point to a single codebase. What went wrong I parked four domains on top of mainapp.com . Three of them — alpha.com , beta.com , a