Processing message failed. Status: 800004005
I'm using Thunderbird 60.5.3 on Windows 10 with Lightning. I've added a FastMail calendar account using CalDav:
https://www.fastmail.com/help/clients/thunderbird.html#calendar
I signed up for a Docker birthday event:
Docker sent me a calendar event. I tried to accept the event in Thunderbird, and I selected my FastMail calendar. Thunderbird told me:
Processing message failed. Status: 800004005
I can manually add events to the calendar without any problem.
Krejt Përgjigjet (2)
Is the event duplicated on another date?
https://groups.google.com/d/msg/mozilla.support.calendar/dGxYnEwdOBo/Sne_arUeBwAJ
No, Docker had just created the event, and it generated the invitation for me from scratch.