Error connecting to database - check your database connection properties in the constants.php file!

SQLSTATE[HY000] [2002] No such file or directory
PHP Version : 7.4.3

Warning: PDO::prepare(): SQLSTATE[00000]: No error: PDO constructor was not called in /var/www/igcspy/admin/includes/Session.php on line 519

Fatal error: Uncaught Error: Call to a member function execute() on null in /var/www/igcspy/admin/includes/Session.php:520 Stack trace: #0 /var/www/igcspy/admin/includes/Session.php(62): Session->addActiveGuest() #1 /var/www/igcspy/admin/includes/Session.php(28): Session->startSession() #2 /var/www/igcspy/admin/includes/controller.php(28): Session->__construct() #3 /var/www/igcspy/tries.php(14): include('/var/www/igcspy...') #4 {main} thrown in /var/www/igcspy/admin/includes/Session.php on line 520