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Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/larkens/public_html/beheer/library.php:36 Stack trace: #0 /home/larkens/public_html/beheer/library.php(36): mysqli_query(NULL, 'select filename...') #1 /home/larkens/public_html/beheer/library.php(65): show_picture('kapschuur1') #2 /home/larkens/public_html/project.php(30): img_replace('Dit weekend zij...') #3 {main} thrown in /home/larkens/public_html/beheer/library.php on line 36