The Azure App registration (UiPathStudioO35App) does not have the API permission set for the Graph API.
I think our docs are really good about this.
See:
What I recommend is to have your admin setup the API permissions for applicationID and Secret.
If you are using your own App registration or Default UiPath O365 application, make sure that for the first time your Azure admin user logs in and to approve the application access.
Later, the other non admin users can use the automation.