Unexpected Error in Sales Order: Transaction not in Balance

Scenario

When users edit Shipping Address in a Sales Order, system throws an Unexpected Error: Transaction not in Balance.

Solution

1. Navigate to Lists > Relationships > Customers
2. Edit Customer record
3. Click Address tab
4. Click Edit icon beside the Default Shipping Address
5. Remove the Country field value and set it back again
6. Click Ok 
7. Click Add
8. Click Save
9. Click F5 to refresh the Sales Order 
10. Click Edit on Sales Order
11. Click Shipping tab
12. Select the original address from the Ship to Select field
13. Select the Shipping Tax Code
14. Click Save