GET 404 Error on favicon.png

GET http://port-80-s8v54mjatt.treehouse-app.com/favicon.png 400 (Bad Request)

Could this be an error on the client-side ?

My code -: var xhr = new XMLHttpRequest(); xhr.onreadystatechange = function () { if(xhr.readyState === 4 && xhr.status === 200) { var employees = JSON.parse(xhr.responseText); var statusHTML = '<ul class="bulleted">'; for (var i=0; i<employees.length; i += 1) { if (employees[i].inoffice === true) { statusHTML += '<li class="in">'; } else { statusHTML += '<li class="out">'; } statusHTML += employees[i].name; statusHTML += '</li>'; } statusHTML += '</ul>'; document.getElementById('employeeList').innerHTML = statusHTML; } }; xhr.open('GET', '../data/employees.json'); xhr.send();

var request = new XMLHttpRequest(); request.onreadystatechange = function () { if(request.readyState === 4 && request.status === 200) { var rooms = JSON.parse(request.responseText); var statusHTML = '<ul class="rooms">'; for (var i=0; i<rooms.length; i++) { if (rooms[i].available === true) { statusHTML += '<li class="empty">'; } else { statusHTML += '<li class="full">'; } statusHTML += rooms[i].room; statusHTML += '</li>'; } statusHTML += '</ul>'; document.getElementById('roomList').innerHTML = statusHTML;

} }; request.open('GET', '../data/rooms.json'); request.send();