We have already added the payment details but unable to acess and error is coming

Let's resolve the error your customers encountered so your customers can send you their payment, @hnvenkateshmurth.

Can you provide to us the exact error message your customers encountered when trying to access the payment link? That'll help us check to see if there's an ongoing issue with it.

You can also let them clear their browser's cache or use other browsers to resolve the error they're having. Sometimes, the piled-up cache in their regular browser caused this unusual behavior. 

First, let them access the payment link using a private browser or an incognito window. If it works fine, clear the cache in the one that they're currently using.

Here’s how to go incognito or use a private browser:

• For Chrome, press Ctrl + Shift + N.
• For Edge or Firefox, press Ctrl+ Shift + P.
• For Safari, hold down Command + Shift + N.

You can check this article for more information: Clear cache and cookies to fix issues when using QuickBooks Online. Once done, restart the browser for the changes to take effect. If not, try using other browsers. 

Here's also more information about Payment enabled invoices—Razorpay.

Feel free to leave your comments below if you have other questions with your invoices. I'm always here to help. Have a wonderful day!