3722942 - GRDC error "Peer certificate path not trusted" during RFC SNC communication via SAP Cloud Connector - Can't get global Parameters

• SAP Group Reporting Data Collection (GRDC) is calling function modules for Group Reporting Global Parameters and other data from S/4HANA Private Edition via RFC SNC connection
• Principle Propagation is configured for GRDC BTP Destinations and Access mapping in SAP Cloud Connector.
• While opening GRDC Apps like "Define Data Mapping" the following error appears GSS-API(min): A2200223: Peer certificate path not trusted
• The connection fails with error code RC -4.

Full error message is:

Initialization of repository destination S4HanaCConsoEndpoint_RFC failed: Establishing connection to communication partner failed with error: Partner signaled an error on handle [x/xxxxxxxx]:
connection parameters: TYPE=a DESTINATION=S4HanaCConsoEndpoint_RFC CLIENT=x00 USER=xxxxx PASSWD =< secret> ASHOST=xxxx SYSNR=xx PCS=x

SCCLOCATIONID=xx
LOCATION CPIC (TCP/IP)
ERROR GSS-API(maj): Miscellaneous failure
GSS-API(min): A2210223:Server does not trust my certificate
path
target="p:CN=xx, O=xx, C=xx"
TIME xxx
RELEASE xx
COMPONENT SNC (Secure Network Communication)
VERSION x
RC -4
MODULE /bas/xxREL/src/krn/snc/sncxxall.c
LINE xxx
DETAIL SncPEstablishContext
SYSTEM CALL gss_init_sec_context
COUNTER xx

Another error could be A2200210:Peer certificate verification failed.

Note: A possible error for "Enter Data Packages" could be "Internal server error". The real error can then only be checked in the SAP Cloud Connector Logs. 

*This Note only refers to SNC implementation that uses the SAP Cryptographic Library. Other vendors' libraries may require different values.

*Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental. 

SAP Group Reporting Data Collection, SAP S/4HANA, Private Edition.

RFC SNC, SAP Cloud Connector, peer certificate path not trusted, GSS-API error, SAP S/4HANA, STRUST, Root CA, login/quiet_mode, security context failure, principal propagation authentication. A2210223, A2200210:Peer certificate verification failed  , KBA , FIN-CS-CDC , Fin.Consolidation - Cloud Data Collection , Problem