I'm create a bookng app show an error


#1

when click on deals this time showing an error.i dont understand .please help me anyone.

{"_isScalar":false,"$ref":"https://my-project.firebaseio.com/deals","source":{"_isScalar":false,"$ref":"https://my-project.firebaseio.com/deals","source":{"_isScalar":false,"$ref":"https://my-project-.firebaseio.com/deals"},"operator":{}},"operator":{}}

please guide me anyone.