Update manager issues

[Chris]

Update manager popped up, clicked on 'install now' (believe that's the
right wording). I left the room and when I came back instead of seeing
the 'software is up to date' it had already closed out. Syslog shows
this - https://pastebin.com/3xM7pYY1

Ubuntu 16.04.1, Gnome 3.18.3


-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11972; -97.90167 (Elev. 1092 ft)
15:35:03 up 8 days, 20:26, 5 users, load average: 0.33, 0.56, 0.64
Ubuntu 16.04.1 LTS, kernel 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016