$expr unknown operator Bad value

Working with Data
, ,
1

I have an array which i am passing as input to the aggregation query

Input array:

[{
  "father_id": "55c14218745aa4110082bd7e",
  "son_id": "55c14218745aa4110082bd7e"
},{
  "father_id": "5511c96190cb3611005261fd",
  "son_id": "5511c96190cb3611005261fd"
},{
  "father_id": "55ad4beeb7b72c1100bc221f",
  "son_id": "55ad4beeb7b72c1100bc221f"
},{
  "father_id": "55c14218745aa4110082bd7e",
  "son_id": "55c14218745aa4110082bd7e"
},{
  "father_id": "55c14218745aa4110082bd7e",
  "son_id": "55c14218745aa4110082bd7e"
},{
  "father_id": "55c14218745aa4110082bd7e",
  "son_id": "55c14218745aa4110082bd7e"
},{
  "father_id": "5511c96190cb3611005261fd",
  "son_id": "5511c96190cb3611005261fd"
},{
  "father_id": "55c14218745aa4110082bd7e",
  "son_id": "55c14218745aa4110082bd7e"
}]

Aggregation Query:

[
  {
    '$graphLookup': {
      'from': 'family', 
      'startWith': '$father', 
      'connectFromField': 'father', 
      'connectToField': '_id', 
      'as': 'family_hierarchy', 
      'maxDepth': 1
    }
  }, {
    '$match': {
      '$expr': {
        '$in': [
          '$_id', {
            '$concatArrays': [
              {
                '$map': {
                  'input': [], 
                  'as': 'relationship', 
                  'in': {
                    '$toObjectId': '$$relationship.father_id'
                  }
                }
              }, {
                '$map': {
                  'input': [], 
                  'as': 'relationship', 
                  'in': {
                    '$toObjectId': '$$relationship.son_id'
                  }
                }
              }
            ]
          }
        ]
      }
    }
  }
]

I am receiving error as follows in the atlas functions:
BadValue Unknown operator $expr

the same query perfectly executed in the compass tool.

Could you please help me with solution to match the above list.
son_id is same as _id in family collection then we have father id.
In order to make hierarchy relation i have used graphlookup and then i am trying to fetch only the list of Ids matching son_id and father_id.
there is a possibility that father may have a forefather as well but neglected for now.