@damienl I have this problem with the Akonadi server on EVERY distribution I've tried, including my brief stint with Linux Mint, which I just don't like. And I can’t really verify it—sometimes it works as long as I don’t make any changes to the connected online account, then, like today during the initial setup, it doesn’t work at all, with constant crashes so that I can’t even select the relevant calendars from the calendar I just connected in KOrganizer to be displayed in the calendar overview in the taskbar (this is when the problems start every time!). And I ONLY have this problem with KDE/Akonadi; never with any other desktops or calendars. And I’m no clueless newbie—I’m a sysadmin who’s been working with UNIX since 1987 and with Linux since 1997. And it’s precisely this fact that drives me crazy—that I can’t solve the problem. That’s why it must be due to the software, over which I have no control.