Fix bug;

js/app.js

@@ -281,11 +281,15 @@ const TimeTrack = {
             let latestHistoryItem = ticket.history[0];
 
             if (this.ticketSystemUrl && this.isTicketNumber(ticket.number)) {
-                let finishedTasks = ticket.tasks.filter((task) => {
+                let finishedTasks = [];
+
+                if (ticket.tasks && ticket.tasks.length > 0) {
+                    finishedTasks = ticket.tasks.filter((task) => {
                         return task.finished > latestHistoryItem.trackingStarted && task.finished < latestHistoryItem.trackingStopped;
                     }).map((task) => {
                         return task.name;
                     });
+                }
 
                 window.open(
                     component.ticketSystemUrl + ticket.number.replace('#', '').trim()+'/time_entries/new?time_entry[hours]='+(Math.round(latestHistoryItem.minutes)/60)+