I am using Blazegraph for a while. However, I cannot use the UI to export my RDF. There is an export button at the bottom of the workbench. When I execute my query and I click on it in order to export my file as RDF/XML format it gives me an error message. It doesn't show me any error when I export as CSV, JSON or XML. I have also tested it with different servers and localhost but I get the same server error pop up message.