How to pass an ng-model to a controller function which calls a GET request to the nodeJS server?

Here's what I'm trying to do:

1. Pass a string from a text input with an ng-model bound to it
2. to a function in the controller which
3. calls a GET request in the service which
4. gets returned by the node server

Below is what I've tried so far, which has given me the following error:

Uncaught object angular.js:78

Main.html (1):

<div class="input-group input-group-lg">
    <input ng-model="businessName" type="text" class="form-control" placeholder="Business Name">
</div>

google.js (2):

var findGPlace2 = function() {
  GoogleService.findPlace2($scope.businessName).then(function(data) {
    $scope.gPlace2 = data;
  });
}
findGPlace2();

google-service.js (3):

this.findPlace2 = function(biz){
    var deferred = $q.defer();
    var obj = {
      business: biz
    };
    $http(
      {
        method: 'GET', 
        url: 'http://localhost:12200/find-google-place-2', 
        data: biz
      }).success(function(data) {
        deferred.resolve(data);
      }).error(function(err) {
      deferred.reject(err);
    });
    return deferred.promise;
  };

server.js (4):

//find google place 2
app.get('/find-google-place-2', function(req, res) {
  request('https://maps.googleapis.com/maps/api/place/textsearch/json?query=' + req.data.biz + '&key=AIzaSyBvakIQ68QV2', function (error, response, body) {
  if (!error && response.statusCode == 200) {
    res.send(body);
  }
})
});

This is a very difficult problem to debug since the error isn't giving me a line in my code. Any help would be greatly appreciated.

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UPDATE: I removed ng-autocomplete from the dependencies, and the Uncaught object error is gone and my angular code is rendering now, but this error came up:

GET http://localhost:12200/find-google-place-2 500 (Internal Server Error) angular.js:8380
    (anonymous function) angular.js:8380
    sendReq angular.js:8180
    $http.serverRequest angular.js:7921

I'm sure it has to do with how I'm passing my req data (the string from the text input), here is the function:

this.findPlace2 = function(biz){
    var deferred = $q.defer();
    var obj = {
      business: biz
    };
    $http(
      {
        method: 'GET', 
        url: 'http://localhost:12200/find-google-place-2', 
        data: biz
      }).success(function(data) {
        deferred.resolve(data);
      }).error(function(err) {
      deferred.reject(err);
    });
    return deferred.promise;
  };

Here's where it's actually running in my server.js file:

app.get('/find-google-place-2', function(req, res) {
  request('https://maps.googleapis.com/maps/api/place/textsearch/json?query=' + req.data.biz + '&key=AIzaSyBvakIQ68QV2', function (error, response, body) {
  if (!error && response.statusCode == 200) {
    //console.log(body) 
    res.send(body);
  }
})
});