Runtime error: coercing to Unicode: need string or buffer, NoneType found

[satheesh_rvs]

I downloaded the vcli package from https://code.vmware.com/tool/vsphere-cli/6.5

and esxcli is binary which am am unable to see the code .

Also am wondering when i run it manually at command line its running fine . When i integrate that with the nagios am facing this error at front end .