Task:  Open the DigiCal App,  Open the Live Raters Meeting  Event Select the Add Reminder for notification and set the notification for 1 hour and 30 minutes before. 
Steps:
Open the DigiCal App
Open the Event of Live Raters Meeting
Click on the Add Reminder
Click on the Drop-down Icon 
Select the notification for 1 hour and 30 minutes before
Click on the Edit Button 
Switch on the Toggle Button for set up the notification 
Click on the right button for save the meeting's notification