Netconf mounts Undefined in Oxygen SR1

We are trying to mount Netconf devices (simulated using Confd) in Opendaylight Controller by following the NETCONF User guide. The issue faced is:
* Using netconf connector for MD-SAL , a virtual device which is simulated using Confd is mounted

• The Mounted Resources section in the Restconf page of Opendaylight does not show the rest end points(API's) of the mounted device. Rather shows it as undefined. Further, it is confirmed that this error exists only in Oxygen. Tested till Nitrogen-SR3 version and it was working fine in those.  Images are attached for both Oxygen and Nitrogen versions.
• The error response that is obtained is: 

• 500 : undefined http://localhost:8181/apidoc/apis/mounts/undefined

Have attached the Error and Debug logs for this issue.