what is the URL to access CoBrowse session reports for OCeana ?

how can we generate and display OCeana co-Browse session reports.
"Avaya Co-Browsing Snap-in Reference" @ https://download.avaya.com/css/public/documents/101081035
Chapter 8 refers to "A user with administrator rights can generate reports in Avaya Co-Browsing Snap-in" and provides field details.

But what is the URL?

https://<<Co-Browse-Cluster-FQDN/services/CoBrowse/v1/dashboard
return 500 internal error "reports not available"

{
"statusCode": "500",
"acsResult": "failed",
"acsResponse": "",
"errorCode": "1010",
"errorMessage": "Reports not available",
"options": null
}