Following a software update, I always get the "Red Banner" saying that there is an error and suggesting a "yum clear cache".
Looking at the log, it's because I get 3 copies of this message as part of /etc/e-smith/events/runlevel-adjust/S20runlevel-adjust:
Mar 14 12:09:54 Nethserver esmith::event: Failed to execute operation: No such file or directory
Fleetingly, before the final "Red Banner", I see a message flash by, which appears to be related to the name I gave for my updates for firewall rules, as per the manual:
config set fw_cd3o service status enabled TCPPorts 3616 UDPPorts 3616 access green
And yes, there are 3 errors and 3 firewall rules defined.