Warning: Undefined variable $idSec in /home/.sites/117/site84/web/images/intro/intro_images.php on line 4

Fatal error: Uncaught TypeError: readdir(): Argument #1 ($dir_handle) must be of type resource or null, false given in /home/.sites/117/site84/web/images/intro/intro_images.php:6
Stack trace:
#0 /home/.sites/117/site84/web/images/intro/intro_images.php(6): readdir(false)
#1 {main}
  thrown in /home/.sites/117/site84/web/images/intro/intro_images.php on line 6