Update transcript-tracer.js

transcript-tracer.js

@@ -459,9 +459,11 @@ function handleWordClick(e) {
   var transcript = wordElement.closest('.tt-transcript');
   var mediaUrl = transcript.dataset.ttCurrentMediaUrl;
   var startSeconds = ttLinkedDataByMediaUrl[mediaUrl].wordTimings[wordIndex].startSeconds
-  var ttData = ttLinkedDataByMediaUrl[ttActivePlayer.dataset.ttLinkedMediaUrl];
-  
+
   ttLinkedDataByMediaUrl[mediaUrl].mediaElement.currentTime = startSeconds;
+
+  if (!ttActivePlayer || !(ttActivePlayer.dataset.ttLinkedMediaUrl in ttLinkedDataByMediaUrl)) return;
+  var ttData = ttLinkedDataByMediaUrl[ttActivePlayer.dataset.ttLinkedMediaUrl];
   
   // Make sure the correct transcript is selected
   if (!ttCurrentTranscript || ttCurrentTranscript.dataset.ttTranscript != ttData.transcriptIndex) {