I have the same problem this notification box appears every 5 seconds or so and I cannot use the calendar at all I have installed libgcc and libc6 not so long before the problem started... Weirdly, I have noticed that the system time got reverted 1 hour backwards,

I have changed it back to correct local time and I assume that the internal error notification problem started to appear after that...

help anyone?

Cheers,
Ralph