ERROR: NMO not setuid-root (Unix-only)

When trying to perform some operations from OEM for the recently installed agents server I got the below mentioned error:

ERROR: NMO not setuid-root (Unix-only)

Cause: root.sh had not been executed from agent home

Solution: Execute the root.sh from agent home and restart the agent.

[root@lnx01 12.1.0.4.0]# pwd
/opt/oracle/product/12.1.0.1.AGT/core/12.1.0.4.0

[root@lnx01 12.1.0.4.0]# ls -lrt root.sh
-rwxr-xr-x 1 oracle oradba 3916 Jul 23 23:33 root.sh

[root@lnx01 12.1.0.4.0]# sh root.sh