Prestashop is a very useful e commerce software. One of the common errors while fresh installation or upgrade is a white screen. This is very disturbing to as there is no error message telling you what is wrong.
Mostly it is due to program running out of allowed memory. This article will show you how to update your server for memory_limit to fix the most common cause of the white screen error.
Go to your cPanel,click on File Manager
Once in the File Manager explore to the folder where PrestaShop is installed. Normally this is the public_html folder.
Find and then open the php.ini file for editing.
Locate the memory_limit setting. It is normally set to 32M, which means 32 MB. Change the setting to something larger, say 128M.
Once changed, click the Save Changes button in the upper right corner.
service httpd restart
Now white screen should be no more there.