Stripe webhook issue for payment_method.attached

I would like my app to store creadit card expiration date of each customer to alert each customer and control user’s right on app a little before their credid card is expirated.

To do this, I use stripe webhook detcting payment_method.attached event but the API constantly failes. It seems that config is correct because Stripe showes the event was successful only when configuring. (I mean the event was successful when I push "Detect data " on bubble and then manually trigger the event on Stripe)

Please help me out on this.

Thanks.