Unable to add widgets to the form

I've tried to insert two different widgets this morning, after using the wizard and hitting update nothing happens. I've waited up to five minutes, nada... what's going on?

We are sorry for the inconvenience this may have caused. We have noticed that there is an issue with adding some widgets to the form. We have reported the issue to our backend team and the issue should be fixed by now. Could you try again and let us know if you experience any further issue so that we can take a look again.

Thank you!