Index: lams_tool_zoom/src/java/org/lamsfoundation/lams/tool/zoom/web/controller/LearningController.java
===================================================================
diff -u -r39c44821fbe9ecde816b4795e55e2da17ed24d25 -raee951ca8793b2fc2067f20105e22138aee6f937
--- lams_tool_zoom/src/java/org/lamsfoundation/lams/tool/zoom/web/controller/LearningController.java	(.../LearningController.java)	(revision 39c44821fbe9ecde816b4795e55e2da17ed24d25)
+++ lams_tool_zoom/src/java/org/lamsfoundation/lams/tool/zoom/web/controller/LearningController.java	(.../LearningController.java)	(revision aee951ca8793b2fc2067f20105e22138aee6f937)
@@ -240,7 +240,7 @@
 		errorMap = new LinkedMultiValueMap<>();
 		request.setAttribute("errorMap", errorMap);
 	    }
-	    errorMap.add("GLOBAL", e.getMessage());
+	    errorMap.add("GLOBAL", e.getMessage() == null ? e.toString() : e.getMessage());
 	    request.setAttribute("skipContent", true);
 	}
 	return "pages/learning/learning";