I am trying to load the stripe iframe so a customer can checkout with stripe but I cant get it to load because of a 404 not found error

I added the route to web.php

Route::post('admin/checkout/checkoutStripeCredit', ['as' => 'admin.checkout.checkoutStripeCredit', 'uses' => 'CheckoutController@loadStripeCreditForm']);

Heres the code to the CheckoutController

public function loadStripeCreditForm(Request $request) {
        if(!Session::has('credit_details')) {
            return redirect()
                    ->route('admin.checkout.show')
                    ->with('flash_error', 'Your session has expired, please try again.');
        }

        try {

            $credit_details = Session::get('credit_details');

            header('Content-Type: application/json');

            $stripe = new \Stripe\StripeClient(env('STRIPE_SECRETKEY'));

            $product = $stripe->products->create([
                'name' => 'Editor World Credit'
            ]);

            $price = $stripe->prices->create([
                'product' => $product->id,
                'unit_amount' => $credit_details['credit_amount'] * 100,
                'currency' => 'usd'
            ]);

            $callback_url = route('admin.checkout.successStripeCredit');

            $checkout_session = $stripe->checkout->sessions->create([
                'mode' => 'payment',
                'ui_mode' => 'embed',
                'line_items' => [
                    [
                        'price' => $price->id,
                        'quantity' => 1
                    ]
                ],
                'metadata' => [
                    'user_id' => json_encode(Auth::user()->id)
                ],
                'success_url' => $callback_url . '?session_id={CHECKOUT_SESSION_ID}',
                'cancel_url' => route('admin.checkout.cancel'),
                'invoice_creation' => ['enabled' => true]
            ]);

            session(['checkout_session_id' => $checkout_session->id]);

            echo json_encode(array('clientSecret' => $checkout_session->client_secret));
        }
        catch (Exception $x) {
            EWLogHelper::create('STRIPE_SUBMIT_ERROR', ['msg' => $x->getMessage(), 'trace' => $x->getTrace()]);
            return redirect()->back()->with('flash_error', $x->getMessage());
        }
    }

when I make post request to /admin/checkout/checkoutStripeCredit it gives me a 404 error. What am I doing wrong.