500 business layer error

Request:
GET /bl/public/api/reo/12277497/properties?orderBy=images.sortorder HTTP/1.1
Host: immobilien.grigkar.at
Accept: */*
Authorization:Basic YW5kcmVhczowN2thc3Rvci4=

Response:
{"error":true,"status":500,"title":"Api call not found: 404"}