Index: lams_tool_mindmap/web/WEB-INF/web.xml
===================================================================
diff -u -rf5c1bfbe0683f40cf0e36a668d3ef2f2986a0ae8 -r5a79df078171252888edd8344f45d22091cabb8c
--- lams_tool_mindmap/web/WEB-INF/web.xml	(.../web.xml)	(revision f5c1bfbe0683f40cf0e36a668d3ef2f2986a0ae8)
+++ lams_tool_mindmap/web/WEB-INF/web.xml	(.../web.xml)	(revision 5a79df078171252888edd8344f45d22091cabb8c)
@@ -70,7 +70,8 @@
 			org.springframework.web.servlet.DispatcherServlet
 		</servlet-class>
 		<load-on-startup>1</load-on-startup>
-		<multipart-config/>
+		<async-supported>true</async-supported>
+
 	</servlet>
 
 	<listener>