Constant Contact Integration error

I am trying to use the Integration system to connect to Constant Contact, however the integration system does not let me submit my request. Please help me to resolve asap.

Cleared your form cache.

Kindly re-integrate  Constant Contact again.

Let us know if the issue still remains.

If the issue still remains, kindly give us a screen shot so that we can check it further.

-How-to-add-screenshots-images-to-questions-to-the-support-forum

Thank you.