Setup Cronjobs in Cpanel for Laravel Script

Laravel Script for Project Management is installed, but only admin can login, no users are able to login. It says "403 PERMISSION DENIED". I talked to the developer he said Cronjob setup is required. Its hardly a matter of few minuets.
The Script I have installed is:
https://codecanyon.net/item/worksuite-project-management-system/20052522