Help the app was awesome and just stopped working? – Evite: Party Invitations Review

The app has been great so far. But just yesterday I went to create my Friday night group and after doing it and adding a few more guests it just shut down on my iPhone. Now when I try to open it all that happens is an attempt and then it disappears. No use of the app at the moment is possible. Help from support? Is this an issue all over and is it being resolved?
Review by Minnadolls on Evite: Party Invitations.