1100605 Receiver State is a mandatory Field [Solution]

When processing an order you might come across the "1100605 Receiver State is a mandatory Field" error.

This message is either shown when the Ship To State is missing, or when shipping to an APO/FPO/DPO, the state is invalid.

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. Correct the state and/or postal code in the order

4. Press Save to apply the changes

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