Fixed - App is crashing in chat screen.

app/src/main/java/com/vsoft/servicenow/ui/ChatActivity.java

@@ -279,8 +279,10 @@ public class ChatActivity extends AppCompatActivity implements OnDSListener, OnD
             if(droidSpeech != null) {
                 droidSpeech.closeDroidSpeechOperations();
             }
-            speaker.allow(true);
-            speaker.speak(message, mNewMessageUtteranceId);
+            if(speaker != null) {
+                speaker.allow(true);
+                speaker.speak(message, mNewMessageUtteranceId);
+            }
         }
 
         mMessages.add(chatBotHistory);