Unable to add vCenter into Foglight. (4306167)

Alarm message: An unexpected issue occurred during data collection from the VirtualCenter. Please review your environment to ensure that data collection has resumed in a normal fashion. If there is a persistent problem or this message recurs regularly please contact Quest Support {Host Port=443, Host Name=host-name.local, Host URL=sdk}.

Agent logs shows the following errors:

2017-06-14 10:59:09.443 WARN    [Quartz[0]-2640] com.quest.agent.esx.task.ESXAgentTask - Inventory and Relations - Error during execution: ERROR: null
java.lang.NullPointerException
at com.quest.agent.esx.task.HardwareTask.isInvalidGroup(HardwareTask.java:1038)
at com.quest.agent.esx.task.HardwareTask.setClusterRule(HardwareTask.java:1026)
at com.quest.agent.esx.task.HardwareTask.setClusterAffinityRules(HardwareTask.java:910)
at com.quest.agent.esx.task.HardwareTask.createVMWClusters(HardwareTask.java:624)
at com.quest.agent.esx.task.HardwareTask.buildInventory(HardwareTask.java:260)
at com.quest.agent.esx.task.HardwareTask.processMetrics(HardwareTask.java:222)
at com.quest.agent.esx.task.ESXAgentTask.collectData(ESXAgentTask.java:167)
at com.quest.agent.esx.task.ESXAgentTask.run(ESXAgentTask.java:218)
at com.quest.agent.esx.ESXAgent.runTask(ESXAgent.java:645)
at com.quest.agent.esx.ESXAgent.esxHardwareCollection(ESXAgent.java:850)
at sun.reflect.GeneratedMethodAccessor1187.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.quest.glue.core.services.EquivalenceInvocationHandler.handleInvocation(EquivalenceInvocationHandler.java:60)
at com.quest.common.proxy.AbstractEquivalenceInvocationHandler.invoke(AbstractEquivalenceInvocationHandler.java:83)
at com.quest.glue.core.agent.AgentInteractionHandler.invoke(AgentInteractionHandler.java:188)
at com.sun.proxy.$Proxy114.esxHardwareCollection(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)at com.quest.glue.core.agent.scheduler.CollectorCallback.invokeCollector(CollectorCallback.java:251)at com.quest.glue.core.agent.scheduler.CollectorCallback.execute(CollectorCallback.java:149)at com.quest.glue.common.util.scheduler.quartz.QuartzScheduler$ScheduledTaskSequentialJob.execute(QuartzScheduler.java:749)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

2017-06-14 10:59:09.443 INFO    [Quartz[0]-2640] com.quest.agent.esx.task.ESXAgentTask - Logging Agent Messages [Fatal-An unexpected issue occurred during data collection from the VirtualCenter. Please review your environment to ensure that data collection has resumed in a normal fashion.  If there is a persistent problem or this message recurs regularly please contact Quest Support
{Host Port=443, Host Name=host-name.local, Host URL=sdk}]

Please download the Hotfix from here, and follow the instructions on how to install.