When all the shipping methods are not available at the checkout, the following error message will be displayed:
Shipping methods unavailable
if you want to modify the error message, please follow the instructions:
Step 1: Navigate to Online Store > Themes, and click the "Edit default theme content".
Step 2: Search for "Shipping not available", enter the text you want, and save it.
Step 3: Search for "Your order cannot be shipped to the selected address", enter the text you want, and save it.
Step 4: You can see that the text has been changed to your customized text!
