The "order" parameter is being erroneously reused for "View More" links which is causing an exception to be thrown. To reproduce issue: Perform a discovery search with results, sort results asc or desc. Click a facet's "View More" link. SearchFacetFilter tries to interpret "asc" or "desc" as a DiscoveryConfigurationParameters.SORT enum element. The solution to the issue is simply to rename the parameter to something else.