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I have just view your site and was able to view the form with no problems. If you are still having issues, can you please provide the browser and version. We will be glad to help.
Yes you can view the form. But once you fill it out and submit thats when you get the error
I have tested your embedded form, but I was not able to replicate mentioned issue. When I submitted your form I got redirected to Thank You page.
From screenshot you provided it seems that you are using Internet Explorer.
I have tested your embedded form in Google Chrome and Internet Explorer 11.
Are you still unable to submit your form? If so, please try to re-embed your form with iFrame code to see if that will resolve your issue. Inside of this guide you can find how to get iFrame code of your form: https://www.jotform.com/help/148-Getting-the-form-iFrame-code
Hope this will help. Let us know if you need further assistance.