How can I add fields and edit my form?

every time I go in to edit, it jumps from the screen with options on left to the preview of the form. Seems to be a glitch but just upgraded and am unhappy I can't edit right now when I need to. Please help. 

Sorry for the inconvenience. We are currently not having any issues with our Form Builder. I checked your form and I was able to enter the Form Builder when I clicked the "Edit Form" button.

Please try to log out from your account and then close your browser. After that, re-open your browser and then log back in to JotForm.

If the issue is still the same, please try to disable any browser extensions/add-ons. Lastly, you may try checking if the issue is happening on another browser.

I have cleared your form cache so that your forms will be refreshed from our servers.

Let us know how it goes. Also, please provide a screenshot on where are you experiencing this issue so that we can further investigate. Thank you.