Flask request.args.get() returns None

I am using flask for my web app, in the process of redirecting the user to a specific next url using request.args.get it did not work although i can see in the url that the next has a value so why does it return None

@app.route("/login", methods=['GET','POST'])
def login():
form = LoginForm()
if form.validate_on_submit():
    user = Users.query.filter_by(username= (form.username.data)).first()
    if user and bcrypt.check_password_hash(user.password,form.password.data):
        login_user(user, remember= form.remember.data)
        next_page = request.args.get('next')
        return redirect(next_page) if next_page else redirect(url_for('home'))
    else:
        flash("Incorrect Username/Password","danger")

return render_template("login.html", title= "Login", form= form )

• I already made a the template for the url i will redirect the user to and here is the url

this is the url

http://4bfb82fe-3038-4e34-8fbe-bb4afd5f4c25-ide.cs50.xyz/login?next=%2Fsetting