Adding sleep data to Google Calendar?

I have been having a hard time adding my sleep data to Google Calendar. I have a calendar named Sleep but when I try to activate the setting, it tells me that the calendar is not found.

Anyone have any advice on this?

Thank you

Hi Sean,
how long has it been since you created the Sleep calendar on you Google Calendar?
When you create the Sleep calendar and then try to sync shortly after that, the sync is not successful, and the calendar is not found. I am not entirely sure why, but seems like there is some short delay in the synchronization (most cases are solved when trying later that day).
Please try again later, and if not successful, use Left ☰ menu → Report a bug, and send us the application log.
Many thanks.