Features / Usability

How do I filter a list of geolocated wiki pages by distance from a point?

I read that this is possible using a filter here: https://doc.tiki.org/PluginList-filter-control-block

I have tried the following code:

{LIST()}
{filter distance="10km" lat="51.5287336" lon="-0.3824611"}
{LIST}

But it is returning the error:

Expression not supported: Search_Expr_Distance

Thanks!