Client error: `GET https://delta-v-ng.fact-finder.de/fact-finder/rest/v4/navigation/deltav_de?channel=deltav_de&event=navigation&sid=d1mls98ct7dqtqp2khhlldu5v6&format=json&query=&filter=CategoryPath%3ASt%C3%BChle+und+Sitzm%C3%B6bel%2FBesucher-+und+Konferenzst%C3%BChle%2FBesucherst%C3%BChle+Serie+ISO&filter=Material%253AStoffsitz+mit+Netzr%25EF%25BF%25BD%25EF%25BF%25BDcken&sort=SalesRanking:asc&query=%2A` resulted in a `400 Bad Request` response: {"error":"Bad Request","errorDescription":"The filter parameter must contain a : to split key and value"}