I'm so sorry to hear this! Through further troubleshooting with our advanced level of support, it appears the .group is what may be causing this experience. Because of this we would suggest first using an short URL converter. Though constant contact does not provide one for our users, there are free third party tools available on the internet. Shortening your URL through one of these tools will give you a link that our system can recognize. I apologize for any inconvenience this workaround may cause. At this time, we are not in the process of updating our survey tool. Though this recommended workaround will allow you to insert your link in your survey's closing page after all.