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Attempting to use VMware vSphere PowerCLI’s Connect-VIServer to a vCenter instance fails with: “The underlying connection was closed: An unexpected error occurred on a send.”

Problem You have VMware vSphere PowerCLI version 5.1.0.4977 installed: You attempt to connect to a vSphere vCenter 6.7: … using the Connect-VIServer cmdlet but it immediately fails with: PowerCLI C:Program Files (x86)VMwareInfrastructurevSphere PowerCLI> Connect-VIServer vCenter.contoso.local Connect-VIServer : 2/22/2019 11:41:37 AM Connect-VIServer The underlying connection was

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Unable to start the Content Library service on a Windows vCenter Server 6.5

Problem You’ve noticed that the Content Library service on your Windows vCenter Server 6.5 has stopped: C:Program FilesVMwarevCenter Serverbin>service-control –status Running: VMWareAfdService VMWareCertificateService VMWareDirectoryService VMwareComponentManager VMwareDNSService VMwareIdentityMgmtService VMwareSTS VServiceManager rhttpproxy vPostgres vapiEndpoint vimPBSM vmon vmonapi vmsyslogcollector vmware-cis-config vmware-license vmware-perfcharts vmware-psc-client vmwareServiceControlAgent vpxd vpxd-svcs vsan-health vsphere-ui

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Attempting to log onto vCenter 6.5 via vSphere Web Client displays the error message: “503 Service Unavailable (Failed to connect to endpoing: [class Vmacore::Http::NamedPipeServiceSpec:0x00000263204438b0] _serverNamespace = / action = Allow _pipeName =\.pipevmware-vpxd-webserver-pipe)”

Problem You attempt to connect to the login page of a vCenter 6.5 server via the vSphere Web Client but receive the following error message from the browser: 503 Service Unavailable (Failed to connect to endpoing: [class Vmacore::Http::NamedPipeServiceSpec:0x00000263204438b0] _serverNamespace = / action = Allow _pipeName

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