I have my iCloud set up on my android laptop but when someone shares with me their iCloud Calendar it pops up with "The owner stopped sharing or you do not have permission to open this calendar" but they have told me they have given me permission. This is for work too so its really important.
Hi GRRjazz,
Thanks for posting to the Apple Support Communities. We understand that you're having trouble accepting an invite to a shared calendar. The best step would be to reach out to Apple Support directly. They can be contacted here: Get Support, or by calling the most applicable phone number from this list: Contact Apple for support and service.
Take care.
Sharing icloud Calendars
