Ship to country must be 2-character country ISO 3116 code [Solution]

When processing orders you might come across the "Ship to country must be 2-character country ISO 3116 code" error.

This error is shown when the Country Code used in the order is missing or does not have a correct format.

Feel free to follow the step-by-step guide written below or the video guide, as you prefer:
 

To do so:

1. Find the order through any of the possible ways (after Import Orders, Batches, Order History, etc) as it applies to the case
 

2. Click the edit button of the order you wish to change

3. Change the Country Code accordingly

4. Press Save to apply the changes

If the rest of the information in the order is correct, you will be able to process it.