Form editor doesn't work in v4: Oops! Something went wrong

Hello! 5-7 days as I can't add anything in my form examples because the editing page showing mistake. I attach screenshot. Many times I can't edit any forms because se it every time. Initially use Google Chrome browser, secondary Opera and observe the same mistake everywhere in both browsers.

ps. When I use Mozilla Firefox - observe the same situation(((

Hi,

We are sorry for the inconvenience issue. Our developers have just fixed your issue. 

Would you please check it? 

If your problem persists, please let us know.

Thank you for informing us about the issue.

Kindest Regards.

Ok now I will check how it works.

Right now it works correctly, thank you!!!)))

But now I have again the same problem with other form...

With this:    

https://www.jotform.com/build/70174272275455

Hi again,

Our developers are working on it again. 

When we fix it, you'll be informed via this topic.

Thank you very much for your patience. 

Hi,

Your forms have no issue with the v4 form editor now. Also, I cleared your form cache. Would you please clear your browser cache either and try it again?

If your problem persists, please inform us again.

We'd be glad to help you.

So now I can edit this form also! Will observe work of other forms later/