Read the statement by Michael Teeuw here.
UNSOLVED Magic Mirror servern just freeze after a while
I running Magic Mirror on a Ubuntu server that I run on vmware and after some days I get this error and I have to power down the server and then restart.
It looks like is some task that does not work. sorry if it is a Picture, it does not want me to copy the text.
I have check and MM is up to date.
Hmm after a update I still have this problem