This setting is applicable only if you are using a pop-up validator.
Often times you might don't want to be strict about zip code validation and let customers skip the zip code validation.
App now allows closing a pop-up feature. To enable, please follow these steps.
1. Visit app > Global Settings.
2. Under Display Config you would find "Allow customers to close a pop-up" option.
3. Please select it even if it says Yes. As this is new setting, you would need to explicitly set it and save settings. You might need to re-set it if it doesn't reflect on frontend.
4. You should see close button on top right hand corner of your pop-up.