Not seeing newly created session variable in blade template.

I'm using Laravel 5.3.

I want to redirect back to a payment page if a user's credit card has been declined. When a user's card is declined they're redirected back to the payment page with the following:

return redirect()->back()->with('msg', "Your card was declined");

I am able to see this in my Controller.

$msg = (session('msg')) ? session('msg') : "";

I'm passing the $msg variable to my Controller...and trying to display it in the template but...nothing.

I am able to see the "msg" variable in debugbar.

I am NOT able to see the variable in my blade templates. session('msg') Session::get('msg') and every other option I was able to find do not work.

I'm trying to display the message in my template with the following:

@if (session('msg'))
                            <div class="alert alert-danger">
                                {{ session('msg') }}
                            </div>
                        @endif

It's almost like my view needs to be re-rendered in order to display the variable.

Any thoughts?

Thanks!