The issue here is that Prestashop is looking for SSL version but SSL is disabled by default in the code. As per this solution, you need to enable SSL in code and database. The steps as mentioned in the said article are as follows:
Go to /classes/controller/FrontController.php and set SSL connection flag to TRUE.
$ssl = false;
change to
$ssl = true;
Then go to database and find PS_SSL_ENABLED parameter in __configuration table and change it value from "0" to "1"
You will also be required to change PS_SSL_ENABLED_EVERYWHERE in the same table to "1"
This worked well for me, thanks