There was a post addressing the https_client snip in a previous SDK version and the response was that it was based on a depreciated library. I see in v6.2 the https_client has been removed as it was still in v6.1. Is the https_server using the depreciated library as well?
The http server library is different than the http_client library, which can be located at 43xxx_Wi-Fi/libraries/daemons/HTTP_server. So, please don't worry about using the server library as it is present in SDK 6.2