I'm getting a 404 not found error in my form

I also get the similar error. 

Error number 404. So, I tried to redesign the form. I am unable to see the preview also.

Again "404  Page not found error, Not found or temporarily moved"

What is the solution?

Can you share us the form link here? I have viewed your forms and was able to view them without any issues.

For example, this cloned form: http://www.jotform.me/form/62163744988469.