What causes 'TypeError: listener must be a function' after editing an error message?

request.on("error", printer.printError({message: "Connection failed. Check connection to the Internet"}));

var profile = require("./profile.js");
var topic = process.argv[2];
var users = process.argv.slice(3);
//users.forEach(profile.get);
for(var i = 0; i < users.length; i++){
    profile.get(topic, users[i]);
}

// Problem: we need a simple way to look at badge count and points
// Solution: use node.js to connect to treehouse's API to get profile info
var http = require("http");
var https = require("https");
var printer = require("./printer")


function get(topic, username){
//Connect to the API URL (https://teamtreehouse.com/username.json)
    var request = https.get("https://teamtreehouse.com/" + username + ".json", function(response){
        var body = "";
        //Read the data
        response.on('data', (chunk) => {
            body += chunk;
        });


        response.on("end", () => {
            if(response.statusCode === 200) {
                try {
                    //Parse the data
                    var profile = JSON.parse(body);
                     //Print the data  
                    printer.printMessage(username, profile.badges.length, profile.points[topic], topic);
//                    console.log(topic);
                } catch(error) {
                    //parseError
                    printer.printError(error);
                }
            } else {
                //Status Code Error
                printer.printError({message: "There was an error getting the profile for " + username + ". (" +  http.STATUS_CODES[response.statusCode] + ")"});
            }
        });
    });

    //Connection Error
    request.on("error", printer.printError({message: "Connection failed. Check connection to the Internet"}));
}

module.exports.get = get;

// Print out message
function printMessage(username, badgeCount, points, topic) {
    var message = username + " has " + badgeCount + " total badges(s) and " + points + " points in " + topic;
    console.log(message);
}

//Print out error messages
function printError(error){
    console.error(error.message);
}

module.exports.printMessage = printMessage;
module.exports.printError = printError;