Fatal error: Uncaught TypeError: mysqli_close(): Argument #1 ($mysql) must be of type mysqli, null given in /home/users/bermar/public_html/cms_sklodowscy_strona/engine_classes/inc/db_class.php:58 Stack trace: #0 /home/users/bermar/public_html/cms_sklodowscy_strona/engine_classes/inc/db_class.php(58): mysqli_close(NULL) #1 /home/users/bermar/public_html/cms_sklodowscy_strona/engine_classes/inc/db_class.php(44): connect_i(NULL, NULL, NULL, NULL) #2 /home/users/bermar/public_html/cms_sklodowscy_strona/main.php(4021): connect(NULL, NULL, NULL, NULL) #3 {main} thrown in /home/users/bermar/public_html/cms_sklodowscy_strona/engine_classes/inc/db_class.php on line 58