...
Check and confirm following SAP Notes are installed or not applicable for your systems:
1487337 - Downporting the class CL_ABAP_DYN_PRG
1410294 - Support SHA2-family for Message Digest and HMAC
Splunk connection
Import valid Splunk endpoint certificate into STRUST (if needed). The certificate should match to the host defined in the connection on PowerConnect side.
Ensure the ports between SAP to Splunk is open for communication . Refer this KB for more information https://help.powerconnect.io/powerconnectdocumentation/kb-166-should-i-use-a-splunk-heavy-forwarder-in-my
Ensure there is no Firewall blocking between SAP to Splunk . Perform TELNET from relevant SAP system to Splunk host to ensure the connection is working fine. Refer to this KB https://help.powerconnect.io/powerconnectdocumentation/kb-197-powerconnect-data-from-abap-system-not-flow
...