The filters_helper is incorrectly assuming that all resources are in the main app. The fix is below

@ -19,6 +19,14 @ def search_path(type)
def resource_path(type)
return '' if type.nil?

-    send(type.pluralize.underscore + '_path')
 +    #send(type.pluralize.underscore + '_path')
 +
 +    object_path = type.pluralize.underscore
 +    if object_path.include?('/')
 +      prefix, suffix = object_path.split('/', 2)
 +      send(prefix).send(suffix + '_path')
 +    else
 +      send("#{object_path}_path")
 +    end