The platform was unable to connect to the MySQL database specified in your configuration file (config/db.php).
yourcpaneluser_rematrix_helpdesk instead of just rematrix_helpdesk). Check cPanel → MySQL Databases for the exact full name.config/db.php Credentials:config/db.php and verify DB_NAME, DB_USER, and DB_PASS match your cPanel MySQL settings.rematrix_helpdesk, click Import, and upload database/localhost.sql.