How to access REST API

I have followed and installed default openvidu-call app by below link
https://docs.openvidu.io/en/2.13.0/deployment/deploying-on-premises/

when we are trying to access the REST api like https://mydomain.com/api/sessions along with headers, Could not get any response getting.

This is not really helpful. "Could not get any response getting."
We can’t just guess what may be happening to you. You need to provide further information or we won’t be able to help out.

i have followed this url https://docs.openvidu.io/en/2.13.0/deployment/deploying-on-premises/

and im able to see the app with my domain name. when i try to access api through rest client like postman. wont get any response

If you run ./openvidu logs what do you get?

What kind of certificate are you using?

my own cerificate which i purchase