The payment API stopped working after changing the application server, what is the reason?

Question

Classmates

We changed the payment url in the application due to the server relocation.
The payment url opens in the browser, but when trying to make a payment in the application, the error "The payment system is under maintenance and will work very soon. Stay tuned!"
With a direct test request of the url, we see the fact of the request and the parameters passed in the server console, when we try to make a payment, there is nothing.
Server certificates are valid.
The nginx logs were checked, there are no requests for this url in the errors, the access.log is also clean, there are only those requests that we send ourselves for verification.
Application on nodejs, behind nginx as an upstream.
What could be the problem and what needs to be done to solve it?

Answer 1

Solution from support OK: refuse https for payment callback and use http. They claim that the notification about the transition to https does not apply to the payment API.
Apparently not all valid certificates are valid for them. We will know.

Answer 2

Hello! I observe about the same problem, but switching to http from https did not help. I connected the payment script, access to it in the browser is excellent. At the same time, when calling with the help of api classmates, the "Payment system is being prevented and will work very soon. Stay with us!" . in access.log is clean. What could be the problem?