What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
The page was loaded over https: and the page was requesting things over http:. Found it in console. Still an issue I believe. Even though I got it to work.
I cloned your form and tried it on my end using https://www.jotform.com and I was not able to duplicate the error. I was able to access the Designer Mode of the form. See screenshot below.
Although I did notice a warning regarding the mixed content of the site but still I was able to access the Form Designer. May I know if you have any anti-virus in your computer that may block our site?
We will wait for your response.