Problem Call back URL after payment is successful

Hi Bubblers,
I’m trying to connect my application with payment API (PAYTABS).
All work fine, but after completing the payment, it will be redirected to the success page.
While returning back to the “success page”, an error appeared (Not found).
Although the page opens normally manually.

Could someone help me or sharing me any idea.

Hi, Did you find any solution for this?