Preview of Approved Content

I’m just following through the latest Webinar for creating a Preview of Approved Content but I get assembly errors for my item.

It seems to be related to the sys_itemfilter parameter.

Our normal preview URLs contain sys_authtype=0 rather than sys_itemfilter=preview.

The error appearing in the log files is You must specify either the authtype or the item filter name

We’re currently running 6.5.2 which has been upgraded from 5.X so are we running a legacy version of the preview?