SSDM-13256: Fixed not fetched physical data exception for data set export.

server-application-server/source/java/ch/ethz/sis/openbis/generic/server/xls/export/helper/XLSDataSetExportHelper.java

@@ -76,6 +76,7 @@ public class XLSDataSetExportHelper extends AbstractXLSEntityExportHelper<DataSe
         fetchOptions.withProperties();
         fetchOptions.withRegistrator();
         fetchOptions.withModifier();
+        fetchOptions.withPhysicalData();
         return api.getDataSets(sessionToken, dataSetPermIds, fetchOptions).values();
     }