thunderbird 157 update deactivated all my calendars

Ric, I've got the same problem - it kills Tasks too. Apparently Tbird 157 breaks the the Add-on 128.5.12 (Philipp Kewisch). I posted my query about this issue yesterday and haven't heard anything yet. Kewisch doesn't post an email address, just a twitter account, which I don't use. I believe one fix would be to downgrade to 156 and turn off auto updates. Right now I'm limping along using Google's ugly web calendar. I expect the Community will be lighting up over the next few days. I'd hate to have to downgrade to 156 and stay there forever.

Glad I'm not alone, I guess. I've tried several things with the help of ChatGPT but with no luck. From what I have seen it appears that the add-on is no longer needed as TB now will connect to google. I'll let ya know if I learn anything new.