error message when trying to submit, after update

Hi Dear Support Team,

The issue is for this web page that contains the form: http://nychildrenchoir4christ.org/audition-registration/

Ever since I updated the Ninja Form plugin, I received that red sentence after pressing “submit”. The red sentence is: “Your email action “Admin Email Notification” has an invalid value for the “TO” setting. Please check this setting and try again.”

The current form’s admin email setting is like this: http://nychildrenchoir4christ.org/wp-content/uploads/2017/01/Screen-Shot-2017-01-18-at-7.28.40-PM.png
I saw another post that talks about this. Mr. Kevin Stover (the author) replied to another person to just put an actual email on the TO. I did that and it did not work. I tried the email of “info@nychildrenchoir4christ.org”, which is the admin email for the site, and I also tried putting my own gmail, which is just my name @gmail.com. Both did not work. I need to fix this urgent, because every day there are people using the form to register an event that is coming up in few days.

Thanks!