my Networker backup is failing due with the following error logs.

what could be the reasons ?

suppressed 6011 bytes of output.
12/7/2021 8:40:34 AM The save job for the save set 'MEDI:xxx' on the host 'netwrkextproxy.xxxx.local' has been completed.
166682 1638837634 2 5 0 8068 6344 0 netwrksvr.xxxx.local savegrp NSR warning 65 Job %u with command '%s' for client %s exited with return code %d 4 5 6 160008 0 455 nsrmedisv.exe -LL -s netwrksvr.xxx.local -g MEDI_DAILY/MED_DAILY/backup/MEDI_DAILY -a "*policy action jobid=160006" -a "*policy name=MEDI_DAILY" -a "*policy workflow name=MEDI_DAILY" -a "*policy action name=backup" -y "Mon Dec 13 23:59:59 GMT+0800 2021" -w "Mon Dec 13 23:59:59 GMT+0800 2021" -m netwrkextproxy.xxxx.local -b EMR_MEDI_POOL -o "\"REQUESTED_LEVEL:level=full;\"" -l full -q -W 78 -N MEDI:MEDI MEDI:MEDI 12 28 netwrkextproxy.xxx.local 1 1 3
12/7/2021 8:40:34 AM Job 160008 host: netwrkextproxy.xxxx.local savepoint: MEDI:MEDI had ERROR indication(s) at completion
12/7/2021 8:40:34 AM netwrkextproxy.xxxx.local:MEDI:MEDI failed.
12/7/2021 8:40:34 AM MEDI_DAILY:netwrkextproxy.xxx.local:MEDI:MEDI See the file 'C:\Program Files\EMC NetWorker\nsr\logs\policy\MEDI_DAILY\MEDI_DAILY\backup_160006_logs\160008.log' for command output.
12/7/2021 8:40:34 AM Client 'netwrkextproxy.xxx.local' is being skipped because no savesets of this client have been backed up as part of the backup action.