2177490 - SSSLERR_PEER_CERT_UNTRUSTED in upgrade phase INPUT-OS-USER-PASSWORDS

Software Update Manager (SUM) fails, showing the message "Return code condition success evaluated to false for process sapcontrol for action get instance properties" in the phase INPUT-OS-USER-PASSWORDS.

The following entries can be found at the log file: <Path to SUM>/SUM/sdt/log/SUM/INPUT-OS-USER-PASSWORDS_XX.LOG:

<date and time> [Info  ]:   Command line: sapcontrol -nr <xx> -host <hostname> -user <sidadm> <SecureField> -prot NI_HTTPS -function GetInstanceProperties
<date and time> [Info  ]:   Standard out: <Path to SUM>/SUM/sdt/tmp/SAPCONTROL_GETINSTANCEPROPERTIES_<xx>_<YY>.OUT
<date and time> [Info  ]: Process ID 74 has been started.
<date and time> [Info  ]: Waiting for process ID 74, name sapcontrol to finish.
<date and time> [Info  ]: Process ID 74, name sapcontrol has been finished, exit code 1.
<date and time> [Error ]: The following problem has occurred during step execution: com.sap.sdt.tools.sysinfo.InstanceDetectorException: The update tool was unable to connect to the SAPControl web service on any of the detected instance numbers. Check that the SAP Start Services are running for all instances in the cluster. See SAP Note 1401712 for further information.
The update tool is unable to detect the instances information for instance number: 0 on host: null via the SAPCONTROL web service API. Either the SAP Start Service associated with this instance is not running or a required functionality is not supported by the current version of the Kernel. See SAP Note 1401712 for further information.
Sapcontrol client could not perform action get instance properties on instance <xx>
Return code condition success evaluated to false for process sapcontrol for action get instance properties.

The log file SAPCONTROL_GETGETINSTANCEPROPERTIES_<xx>_<YY>.OUT in <Path to SUM>/SUM/sdt/tmp has the below error:

<date and time>
GetInstanceProperties
FAIL: SSSLERR_PEER_CERT_UNTRUSTED (WSATYPE_NOT_FOUND: The specified class was not found.), SapSSLSessionStart failed in plugin_fopen()

• SAP NetWeaver based products running with SAP kernel release 72x
• Upgrade Tools for ABAP / Java
• Client/Server Technology - Startup Service
• Security - Secure Sockets Layer Protocol
• Java Application Server - Security, User Management / SSO, Logon

Sapstartsrv, SSL, HTTPS , KBA , BC , Basis Components , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-UPG-TLS-TLJ , Upgrade tools for Java , BC-CST-STS , Startup Service , BC-SEC-SSL , Secure Sockets Layer Protocol , Problem