"rsync error: some files could not be transferred (code 23)" means that while using the rsync command to transfer files between two systems, some files failed to transfer due to an error.
"Command PhaseScriptExecution failed with a nonzero exit code" means that during the execution of a command or script, an error occurred and the command or script was unable to complete successfully. The "nonzero exit code" indicates that the command or script terminated with an error instead of completing normally.
