OID root.sh seems to have an error in IDM 11.1.1.x ; root.sh does not set the setuid for the OID procs. You need to change them with: chmod 4750 oidldapd chmod 4700 oidmon chmod 4700 oidrepld and retry the configuration afterwards. The strange thing though is that the installer than proceeds with using ports 3060 and 3061. Restart - and as the permissions are ok now - it will work.
Some of the stuff I do for a living. This mainly concerns working with Oracle Databases and Application Servers. Lately I picked up AWS, Azure and OCI.