Google Calendar Integration Not Loading Main Calendar

I’ve deleted and reloaded my Google Calendar integration, and reset the OAuth credentials but when I view available Calendar Entities it only shows the “additional calendars” I have created alongside my primary google calendar, and my primary google calendar shows as “unavailable”.
The authorisation must be working to enable access to the “sub-calendars”, so anyone know what’s going on and how to fix it?
Running HA Core 2024.6.0
Thank you

It makes no sense indeed. Have you tried to delete and redo the integration again (I know that this is annoying but maybe the only choice) ?

Thank you. Unfortunately that didn’t work, but I’ve just updated to the latest HAOS and HA Core and it’s back working again!

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