err.message() is not a Function

[hirocsingh]

Env - React Web App running on localhost.
Problems:
Network: CORS Error
Console:

• err.message() is not a Function
• err.message : Failed to fetch

Totango UI:

• Some how I see the Activity Tracked.

Code:

        tracker.trackActivity(userInfo.data.Customer.id.toString(), userInfo.data.email, 'User Logged In', 'Some Module', function(err){
          if (err) { console.log(err.message()); } // If it's err.message - Failed to Fetch
          else {
              console.log('Successfuly tracked login - Totango')
          }
        });