Stripe Payment Integration React Native + Laravel - php

Question

I want to integrate stripe payment in react native. Application's back-end is in Laravel.
This is what I came to know. We send amount, currency to the back-end that Intents Stripe payment and return a client_secret that is used in react native to send it to stripe and made payment successful.
This was the controller code as provided
Stripe::setApiKey(env('STRIPE_SECRET'));
$intent = PaymentIntent::create([
'amount' => ($request->grand_total - $request->coupon_discount) * 100,
'currency' => $request->currency
]);
$client_secret = $intent->client_secret;
but at $intent error is returned
[Error: Request failed with status code 500]
then I tried reference: https://stripe.com/docs/payments/payment-intents
\Stripe\Stripe::setApiKey('KEY_HERE');
\Stripe\PaymentIntent::create([
'amount' => 1099,
'currency' => 'usd',
'payment_method_types' => ['card'],
'confirm' => true,
]);
but the same error
Then I tried reference: https://stripe.com/docs/api/payment_intents/object
$stripe = new \Stripe\StripeClient(
'KEY_HERE'
);
$stripe->paymentIntents->create([
'amount' => 2000,
'currency' => 'usd',
'payment_method_types' => ['card'],
]);
actually I don't have knowledge about Laravel. If any one can suggest me what's wrong.
In stripe logs page post request is now successful after removing
'confirm' => true,
but still error is same 500.