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Tbird calendar invitations stopped working after Big Sur upgrade

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Thunderbird 78.5.0 (64-bit). OSX 11.0.1. After the upgrade when I invite attendees and send, the invitation isn't sent - the meeting is booked on my calendar with only myself attending. I have three email accounts: this problem occurs with the two Gmail account calendars, but not with the third.

Thunderbird 78.5.0 (64-bit). OSX 11.0.1. After the upgrade when I invite attendees and send, the invitation isn't sent - the meeting is booked on my calendar with only myself attending. I have three email accounts: this problem occurs with the two Gmail account calendars, but not with the third.

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Have you resolved your issue?

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The problem still exists - I haven't received any suggestions to solve it.