Unable to add kapsel logon plugin in cordova based apps via command prompt

Hi Experts,

Currently I am facing problem while adding kapsel logon plugin to cordova based application as I am using SMP SDK 3.0 SP10 version.

Node version  - 0.12.7

Cordova version - 5.4.1 (latest one )

Plugman version  - 1.0.5

Kapsel version - 3.10.0

npm version  - 2.11.3

Error says "Failed to fetch plugin  kapsel-plugin-corelibs via registry"  and saying Probably this is either connection problem or plugin spec is incorrect..

What could be reason for this ??

Could you please suggest me on this problem like is this correct combination of software OR how can fix this issue in order to add Logon plugin ?

As Error and version shown in below snaps

Thanks!!

Best Regards,

Brajesh Kumar