Comment 27 for bug 1797945

I found it really hard to find good answers to this problem - It was such a shock, and so important, that I was surprised this site was not no.1 in a Google search.

After hours of trying different things and searching, I reverted to 57.2 and locked that in.

Then, I accidentally came across https://addons.thunderbird.net/en-us/ which contained the https://ftp.mozilla/pub/calendar/lightning/candidates/ solution - in French. That worked for me.

I know it's free software, and I've been using it for years, quite contentedly, but .... This is not the first time that a Ubuntu Thunderbird update has broken something important.

If this is not a bug, what it is?