Warning: getimagesize(../photos/.jpg): Failed to open stream: No such file or directory in /home/httpd/vhosts/pianostern.ch/httpdocs/includes/squaredPhoto.php on line 18

Fatal error: Uncaught ValueError: imagecreatetruecolor(): Argument #1 ($width) must be greater than 0 in /home/httpd/vhosts/pianostern.ch/httpdocs/includes/squaredPhoto.php:38
Stack trace:
#0 /home/httpd/vhosts/pianostern.ch/httpdocs/includes/squaredPhoto.php(38): imagecreatetruecolor(NULL, NULL)
#1 {main}
  thrown in /home/httpd/vhosts/pianostern.ch/httpdocs/includes/squaredPhoto.php on line 38