I am facing a similar problem. My application is to call the Vsphere API "RetrieveServiceContent" from C++ module. And it is failing with the SOAP_SSL_ERROR (30). The recent change was that the OpenSSL was upgraded from the 1.1 to 3.0. After upgrade, the client application is failing to call the VSPhereAPI with above error. Where as, the older version of client application is successfully using older version of OpenSSL binaries and working fine.
Can anybody share inputs, to address this scenario ?
Regards,
Mahadev