Today it crashed twice.
I saw this as the last message:
dom0 anacron[28220]: Can't find sendmail at /usr/sbin/sendmail, not mailing output
I also saw this message a few lines before:
Xen free = 251622285 too small for satisfy assignments! assigned_but_unused=23471681968, domdict={'0': {'memor
I saw others see these errors too when they have crashes:
and
However so far I have not found the cause or a solution for QubesOS crashing.