Failure occurs during vCenter Plug-in use on Firefox 59.0.2 browsers

Message
Name:HttpErrorResponse Raw Message:Http failure response for https://vc6/ui/solidfire-war-4.2.0-SNAPSHOT/rest/vsphere//servers: 500 Internal Server Error Return Message:Server error. Please try again or contact NetApp support
Description
This issue occurs in vSphere HTML5 web clients using Firefox. The vSphere Flash client is not affected.
Corrective action
Use the full FQDN in the browser URL.