I'm having issues configuring form e-mail notification

When I try to change notification receivers the screen shows a erro message and a button to reload but it still isn't working. Can you fix it for me?

Thanks.

I was not able to replicate your issue on a cloned form.

I also logged into your account and also was not able to replicate your issue.

It was probably a temporary bug. Please let us know if the issue persists.