Data must be a valid JSON object. Received: "{0}". Parse error: "{1}"
The default transformResponse will try to parse the
response as JSON if the Content-Type header is application/json, or the response looks like a
valid JSON-stringified object or array.
This error occurs when that data is not a valid JSON object.
To resolve this error, make sure you pass valid JSON data to transformResponse. If the response
data looks like JSON, but has a different Content-Type header, you must
implement your own response
transformer on a per request basis, or modify the default $http responseTransform.