I installed the theme but I can only see the blank page, what should I do?
At first you need to be sure that all steps from documentation were done correctly, especially uploading /override folder to your server. If above is done than you need to reset Prestashop cache. To do this go to your back office and turn off Prestashop caching (for a while), you will find it in Advanced Parameters -> Performance tab.
If you are using Prestashop 1.5.5.x or above than you will also need to delete file called class_index.php located in /cache folder. You have to do it manually via FTP or your server file manager (cPanel for example).