My Calendar
Calendar entries owned by Internal logged-in User.
Configure the user profile on the Object Settings when the tab is not visible.
Go to Setup > Profile > Choose the Profile for the Internal log-in User > Object Settings > My Calendar > Default On > Save.
Also, give access to the Apex Classes.
Note: You need to configure the Profile of the User that you want to give access to the My Calendar tab component.
In the Internal log-in User profile, go to the Apex Class Access and the following Apex Classes
PosiEd.CalendarController
PosiEd.ColorHexGenerator
PosiEd.CustomCalendarPortalHandler
You can now check the My Calendar by searching it on the App Launcher.
To check if the component is working, go to Setup > Users > Look for the staff member (Ex. Michael Aitken) > click Login.