[WICG/webcomponents] Issue while exporting calendar event from Microsoft Graph Api (#920)

I am getting error while running script to exporting calendar event from Microsoft Graph Api

I am using code from link : 
https://github.com/spjeff/office365/blob/master/office365-read-all-calendar/O365-ReadAllCalendar.ps1

Application created in Azure with Mentioned permission.

![image](https://user-images.githubusercontent.com/82167363/114053281-70406f80-98ac-11eb-82dd-cc5a6e8402ac.png)


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