I am sorry you are having these issues. We found your crash in our error dashboard and we are working on a fix for it.
Meanwhile, to get Handle working again you can do the following steps
1. Go to settings on home screen and go to handle app . (iOS Settings -> Handle )
2. Tap into Handle. Go to Handle Settings. Switch on the 'clear queue on next restart' switch
3. Quit (swipe up ) and Open Handle
4. The app should start you into the todo mode
5. Go to Sidebar in Handle. ( Handle Settings -> Email Accounts )
6. Tap on the email account (oferwebman@gmail.com)
7. Remove the account
8. Add the account back.
You should now be all set. Try delegating a todo and let me know.
Sorry for all the issues with Handle.
Vijay