wait #6496

diff --git a/js/libs/fluidbook/fluidbook.stats.js b/js/libs/fluidbook/fluidbook.stats.js
index 1bd43b42a5ce94152f457a540ebdf28c46d8e013..6335a5d7c6f4096a8a4b924bbdcccd5ede0cddd0 100644 (file)
--- a/js/libs/fluidbook/fluidbook.stats.js
+++ b/js/libs/fluidbook/fluidbook.stats.js
@@ -6,7 +6,7 @@ function FluidbookStats() {
 
 FluidbookStats.prototype = {
     setupMatomoTagManager: function () {
-        if (SETTINGS.matomoTagManager !== '') {
+        if (SETTINGS.matomoTagManager !== undefined && SETTINGS.matomoTagManager !== null && SETTINGS.matomoTagManager !== '') {
             var _mtm = window._mtm = window._mtm || [];
             _mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
             var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0];