Index: lams_tool_assessment/web/includes/javascript/chart.js
===================================================================
diff -u -rc33d4aa11d22778bd16a874f0a95237da3f2f10c -r6e6de7ca18164b180cd108d5862b166e7e078bf3
--- lams_tool_assessment/web/includes/javascript/chart.js	(.../chart.js)	(revision c33d4aa11d22778bd16a874f0a95237da3f2f10c)
+++ lams_tool_assessment/web/includes/javascript/chart.js	(.../chart.js)	(revision 6e6de7ca18164b180cd108d5862b166e7e078bf3)
@@ -6,7 +6,7 @@
 		if (!event.data) {
 			return;
 		}
-		var data = JSON.parse(event.data);
+		var data = JSON.parse(decodeURIComponent(event.data));
 		drawActivityCompletionChart(data, animate);
 		drawAnsweredQuestionsChart(data, useGroups, animate);
 	}