SYSVIEW XSC command yields "XSYS005E XSystem session server not found" for system running z/OS 2.4

Products

• COMMON SERVICES FOR Z/OS
• 90S SERVICES
• Common Services
• SYSVIEW Performance Management

Issue/Introduction

I am running SYSVIEW v15 and Common Services v14.1 on z/OS v2.3.  I have cross-systems services working fine between all 8 systems.  I upgraded one system to z/OS v2.4 and now I get message "XSYS005E XSystem session server not found" for the system now running z/OS 2.4.
This occurs on all systems when I enter command "XSC xxxx" through SYSVIEW.  I can perform XSC from xxxx to all of the other 7 systems. 
Additionally, the SYSTEMS command in SYSVIEW fails on all systems; I receive the message that the server is not found.      
  All I changed is the z/OS release level so why is the cross systems server not starting on the z/OS 2.4 system? 

NOTE:  The current release of Sysview is 17.0 -  both r15.0 and r16.0 are EOS - r15.0 since 31 March 2023 and r16.0 since 30 June 2024

Environment

Release : r14.1 or r15.0 of Common Services

Component : CCIMVS - COMMON SERVICES FOR Z/OS 

Cause

Necessary z/OS 2.4 maintenance for CCI not applied

Resolution

Needed to apply necessary Common Services maintenance for compatibility with z/OS 2.4.
For CCIMVS r14.1 - SO08282.  The equivalent maintenance for CCIMVS r15.0 is SO08287.