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Warning: include(): Failed opening 'dynamic/call.php' for inclusion (include_path='.:/usr/share/php') in /confereneceLV/universal_code/ppt-page.php on line 4

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Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /confereneceLV/universal_code/ppt-page.php:12 Stack trace: #0 /confereneceLV/universal_code/ppt-page.php(12): mysqli_query() #1 {main} thrown in /confereneceLV/universal_code/ppt-page.php on line 12