If your Photo Cart is suddenly getting a 500 error or only displaying a blank page then you or your hosting company has updated the PHP (programming language) to PHP 7 which Photo Cart is not compatible with (and will not be compatible with) mainly because of the removal of the my_sql functions which are replaced with my_sqli functions.
We get a confirmation paid via paypal
If you go into photocart you can see a payment has been made and for what photo’s
But we do not get the confirmation email as paid and links …. to images ordered etc.,