No handler found for {"attachment"=>#<ActionDispatch::Http::UploadedFile:0x40b0d50 @tempfile=#<Tempfile:C:/Users/user/AppData/Local/Temp/RackMultipart20160907-8148-1q6j8nz.png>, @original_filename="Anpassung.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"attachment[attachment]\"; filename=\"Anpassung.png\"\r\nContent-Type: image/png\r\n">}