Thanks @mpalokaj,
I figured out an issue that all links which has options-general.php in the url shows 404 file not found. So I replaced the url from
https://ecample.com/wp-admin/options-general.php to
https://ecample.com/wp-admin/admin.php
in the browser url. Now I am getting some other.
But still it is not working.
I tried using postman but due to same url issue it’s not working.
Any solution to the url problem