please correct this code and help me earn this badge ...have completed all tasks ..except this one ....

IF( MONTH( NOW() ) = 12,
  DATE( YEAR( NOW() ), 12, 31 ),
  DATE( YEAR( NOW() ), MONTH( NOW() ) + 1, 1) - 1

Hello,
I can't seem to pass the challenge "Integrating External Data" challenge in "Lighting Connect" module. I think I have done everything needed. 
When I checked the challenge, it says "System.ExternalObjectException: data.api.DataSourceException: This data isn't available because the phones object's "Phone_UUID" field has an invalid relationship."

I do have an indirect relationship set up from the Phone to User entity as required by the challenge.

Anyone have the same problem ?