Thunderbird 64 - 503 Service Unavailable Error

Hi,
Note that if you’re using Thunderbird 64, I couldn’t get it to connect to CalDav, and it was returning a 503 Error in the Console.

I found this article however and was able to resolve it:
https://github.com/nextcloud/server/issues/10134

Go to Thunderbird Options, Advanced Pane, General Tab
At the bottom is a ‹ Config Editor › button
Accept the risk (if applicable)
Search for ‹ network.cookie.same-site.enabled ›
Set to False
Restart Thunderbird (I also had to re-subscribe to the calendar).
Solved.

Anyway, thought I’d share my results for you all.

Kevin

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Thanks for sharing! It is helping all of us!