Related to public payment gateway redirection url from checkout page

Hello, I have created a public payment app with payment gateway extension and our extension is also approved by shopify. We are testing our payment app on development store before making it live. We have activated our payment gateway in development store and payment gateway also showing at checkout page. But issue is this, When we clicks on “complete order” button on payment page, it not redirects on our app page and showing below error to us. Please check - “Your payment can’t be processed for technical reasons. Try again or use a different payment method.”

https://prnt.sc/rSIxYOt2kcP1

I have provided my app url in extension also, but it is not using app url from there - https://prnt.sc/Zab8mGA2cC6o

Please help me to resolve this issue.. if I am missing anything please let me know. Thank You!

Are you using the draft url of the app extension? or a published app extension url?

Public Payment App extension is approved and published.. https://prnt.sc/RmwV2Vzqh3CW

but it still not redirecting on given payment session url.

Check if Draft is enabled

https://prnt.sc/VcKZx1M5JvmO

If it is, in theory it should call the Payment session URL configured inside Draft.

Draft is enabled https://prnt.sc/ld-CUsqn8K3h and I have added my app url in payment session url field.

not getting order data on payment session url, please let me know if anyone can help me.

were you able to get shopify to talk to your end with mtls?