I’m sorry to hear about the troubles you’re having. It is possible there might be some interference between the browser and the new interface. Some troubleshooting steps to try and remedy the situation are as follow:
If these steps do not resolve your issue please reach out to us at social_support(at)constantcontact(dot)com with your browser and computer information so that we could troubleshoot further. Please reference this community post as well as your username in your e-mail please.