Fix Website Showing 403 / 500 Errors After Server Migration (Laravel / PHP)

We recently migrated our website from HostPapa to HostGator and the site is no longer functioning properly. The website includes: A front-end HTML/JavaScript puzzle game A Laravel backend that powers... (Budget: $10 - $30 CAD, Jobs: API Development, Backend Development, cPanel, HTML, Laravel, MySQL, PHP, Troubleshooting, Web Development, Website Optimization)