Trying to change the port group of my virtual machine to one that is used for all virtual machines in a particular Resource Pool. I get a null pointer exception, when I try to use the vsphere cloud plugin. Cloud user account is able to do that through Vcenter GUI

Building on master in workspace /var/lib/jenkins/jobs/test vcenter networking reconfiguration/workspace
[vSphere]
[vSphere] Performing vSphere build step: "Power-Off VM"
[vSphere] Attempting to use server configuration: "vcenter"
[vSphere] Shutting Down VM FW-DEV...
[vSphere] Successfully shutdown "FW-DEV"
[vSphere]
[vSphere] Performing vSphere build step: "Reconfigure VM"
[vSphere] Attempting to use server configuration: "vcenter"
[vSphere] Reconfiguring VM "FW-DEV". Please wait ...
[vSphere] Preparing reconfigure: Edit Network Adapter ""
[vSphere] Reconfiguring Distributed Switch Port Group -> pgFirewall Port Id ->
[vSphere] Exception
org.jenkinsci.plugins.vsphere.tools.VSphereException: java.lang.NullPointerException
at org.jenkinsci.plugins.vsphere.tools.VSphere.getDistributedVirtualSwitchByPortGroup(VSphere.java:883)
at org.jenkinsci.plugins.vsphere.builders.ReconfigureNetworkAdapters.perform(ReconfigureNetworkAdapters.java:173)
at org.jenkinsci.plugins.vsphere.builders.Reconfigure.reconfigureVm(Reconfigure.java:81)
at org.jenkinsci.plugins.vsphere.builders.Reconfigure.perform(Reconfigure.java:58)
at org.jenkinsci.plugins.vsphere.VSphereBuildStepContainer.perform(VSphereBuildStepContainer.java:91)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:782)
at hudson.model.Build$BuildExecution.build(Build.java:205)
at hudson.model.Build$BuildExecution.doRun(Build.java:162)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)
at hudson.model.Run.execute(Run.java:1738)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:98)
at hudson.model.Executor.run(Executor.java:410)
Caused by: java.lang.NullPointerException
at org.jenkinsci.plugins.vsphere.tools.VSphere.getDistributedVirtualSwitchByPortGroup(VSphere.java:878)
... 13 more
Build step 'vSphere Build Step' marked build as failure
Finished: FAILURE