Xrm.Page.context.getClientUrl() + "/CRMReports/rsviewer/QuirksReportViewer.aspx" returns 404 in version 9

I hope someone can figure this out. 

The following snippet of code is widely used (see link) when attempting to run an online report and capture it's output, so that is it can be attached to an email.

Xrm.Page.context.getClientUrl() + "/CRMReports/rsviewer/QuirksReportViewer.aspx";

In version 9 of Dynamics 365), the URL returns a 404 error. 

It still seems to work in version 8.2.1 of D365.

Any suggestions would be appreciated.

Cheers,

Mark