Laravel 5.2: Ajax login not working on live server, but working fine on localhost. Auth not working on live server - ajax

Question

I am making a project in laravel 5.2
I have an issue.
this is a school management system where admin/teachers/students login to see their dashboard.
I have made a login page where username and email is given and users can login.
I have my own table for site users named "systemusers".
login is working fine on localhost but its not working on live server.
Auth is not working and users are redirected to login page again
JQUERY CODE:
function loginForm(formID){
//Empty validation errros
$(".errors").html("");
$(".failure").html("");
//Form error flag
var form_error = false;
var form_id = document.getElementById(formID);
var form_data = new FormData(form_id);
$("#"+formID+" input").each(function(key,value){
//Get ids
var id = $(this).attr('id');
if($.trim(this.value) == '' )
{
$("."+id).html("Empty");
form_error = true;
}
else{
if( id == 'username' )
{
var email = $("#username").val();
if( !isEmail(email) )
{
$("."+id).html("Email not Valid");
form_error = true;
}
}
else{
$("."+id).html("");
}
}
});
if( form_error === false )
{
$("#login-btn").prop("disabled", true);
//Run Ajax
$.ajax({
url:'loginFormSubmit',
method:'POST',
data:form_data,
cache:false,
contentType:false,
processData:false,
success:function(html)
{
//alert(html);
if($.trim(html) == 'ERROR-PASS')
{
$(".failure").html("Ivalid Password");
$("#login-btn").prop("disabled", false);
}
else if($.trim(html) == 'ERROR-EMAIL')
{
$(".failure").html("Email not Registered");
$("#login-btn").prop("disabled", false);
}
else
{
//alert(html);
window.location.replace("schoolsys/dashboard/");
}
}
});
}
return false;
}
LOGIN CONTROLLER FUNCTION CODE
public function postLoginUser()
{
//Get the email address posted via Ajax request.
$ajax_email = $_POST["email"];
$ajax_pass = $_POST["password"];
//Check if the email is registered.
$user = $this->systemuser->where("email", "=", $ajax_email)->first();
//If email is matched
if($user )
{
//Match the passwords
if( Hash::check($ajax_pass, $user->password) )
{
$loggedIn = Auth::login($user);
echo "LOGIN-SUCCESS";
}
else{
echo "ERROR-PASS";
}
}
else{
echo "ERROR-EMAIL";
}
DASHBOARD CONROLLER FUNCTION:
public function index()
{
if(!Auth::check())
{
return redirect()->route("login")->withErrors(["Please Login First"]);
}else{
return view("Dashboard");
}
}
ROUTES:
<?php
//Dashboard Route
Route::group(["middleware" => ["web", "auth"]], function(){
Route::get("/dashboard",
[
"as" => "dashboard",
"uses" => "DashboardController#index"
]);
});
//Login View Route
Route::group(["middleware" => ["web"]], function(){
Route::get("/login",
[
"as" => "login",
"uses" => "ajaxLoginController#loginView"
]);
//Ajax - Login Form
Route::post('/loginFormSubmit', 'ajaxLoginController#postLoginUser');
});
//Post Login Form - Double check
Route::post("/post-user-login",
[
"as" => "postLogin",
"uses" => "DashboardController#doubleCheckpostLoginUser"
]);
//Logout Route
Route::get("/logout",
[
"as" => "logout",
"uses" => "DashboardController#logout"
]);
//Add Admin Route
Route::get("/add-admin",
[
"as" => "add-admin",
"uses" => "DashboardController#addAdmin"
]);
//Ajax - Add Admin Form
Route::post("/create-admin", "DashboardController#ajaxPostAdmin")
?>