Magento 2.1.7 When enable the module, Checkout crash

[ChristoforosKotsios]

Hello.

I have an e-commerce site in Greece and I need some extra fields in the checkout process. I find your module and I follow its instruction in order to install it. After installation, I had in my mind to modify field labels.

The problem is that I never got there. After installation, and with the module enabled I try to make a try order to see that module works correctly.

Unfortunately, I find that in the first step of checkout the module crash and I have not access in the fields.

I provide to you an photo in order to see your problem by your self.

Any idea in order to solve it?

[sbodak]

Do you have any specific JS errors?