Attention
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.
You would need to have the PHP version downgraded to 5.6 in order for Photo Cart to work. If downgrading the PHP doesn't work then you may have to update Photo Cart to the last version of 7. Download Photo Cart 7 upgrade files. Upgrade instructions.
Photo Cart was retired in 2015. Check out Sytist.
Error After Upgrading Apache On Server
and now get the following error when trying to logon to photocart, both in admin, or as a client
Unable to connect to the database The server requested authentication method unknown to the client
I suspect its some sort of password incompatibility error in the version change
All other websites including Sytist are running fine since the upgrade, its only photocart I have the error with
My Email Address: info@picturespro.com
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