I installed Thunderbird (68.1.1 32 bit) on a new PC with Windows 10 Pro (build 1903). It worked fine for a while but then Today Panel stopped working - meaning that it only displays a couple of events from 2016. I have several Calendars (mainly Google's but also a readonly Outlook calendar) correctly synced and I can see all the events in the Calendar tab, but the Today Panel doesn't show them. For a while closing Thunderbird and Firefox and restarting solved the issue but not the panel is gone: I can't make it work. Any suggestion as how to fix this? The panel is quite useful.