My form's Thank You page is not displaying

Hi, 

I'm having an issue where the Thank You page is not displaying on a form that I just built. I've tried using the preview link and I've also embedded the form on a hidden test page on our site and I keep getting the same error message.

Here are the two links:

https://form.jotform.us/72194004196151 

http://www.heart.org/HEARTORG/General/Accessibility-Training-Test-Subhome-Page_UCM_481043_SubHomePage.jsp

I just tried another form that was built recently and found the same issue:

https://form.jotform.com/71974756596174 

I then tried one of our older forms that is already on our site and the Thank You page does appear on this form:

http://www.heart.org/HEARTORG/Giving/WillsTrustsandAnnuities/Forms/Estate-Plan-Notification_UCM_487249_SubHomePage.jsp 

I've attached a copy of the message I'm seeing in Chrome.

I have tried submitting your JotForm from the web page and see that the Thank you page is displayed correctly. 

I have cleared the form caches for your account to see if that helps. Could you try submitting the form on a private/incognito window or a separate browser? Also, please try submitting the form on your mobile using mobile data and check if you are able to submit it without any issue.

Please get back to us if you need any further assistance. We will be happy to help.