Browser does not display correctly Jotform site

Every time I try to edit the form there's an error with the browser.  I really need this fixed because I need to edit a confirmation e-mail that's being sent to the registrant.

Which browser are you using? Are you experiencing this situation with more than one browser? Also have you experienced this situation in more than one device?

You may try clearing your browser's cache to see if it solves. Let us know if the problem persists.
Thank you