General

Order was not created. Reason: This product is currently out of stock

Learn how to resolve “Order was not created. Reason: This product is currently out of stock" error. 

#selling #out of stock #order #quantity
Mage registry key already exists

Read what to do if "Mage registry key already exists" error occurred after the Module installation/upgrade.  

#cache #compilation #installation/upgrade
Order was not created. Reason: Please specify a shipping method

Find out how to resolve "Order was not created. Reason: Please specify a shipping method" error.

#external tool #shipping #order
Currency Changing is not allowed and You are not able to change Payment Currency

The errors may occur during the Subscription activation process if the data (value) has been cached. 

#clients portal #subscription activation #payment currency