Square payment error: Access token is missing message after submitting the form

No one can submit forms , they are getting an error message after they try to submit. It says square payment error. Access token is missing. How do we rectify the problem? 

I checked your form and I can see that the Square payment integration is not yet configured correctly. Here's how to fix it:

In the Form Builder, select the payment field and then click the "Payment Settings" button. In the Square Integration wizard, please click the "Connect with Square" button.

Here's a guide: How-to-Integrate-Form-with-Square

Hope that helps. If you have any questions, let us know.