Relevant line from KernLog.txt (timestamp etc. removed):
apparmor="DENIED" operation="connect" profile="/usr/bin/evince-previewer" name="/run/dbus/system_bus_socket" pid=25608 comm="pool" requested_mask="rw" denied_mask="rw" fsuid=1000 ouid=0
Relevant line from KernLog.txt (timestamp etc. removed):
apparmor="DENIED" operation="connect" profile= "/usr/bin/ evince- previewer" name="/ run/dbus/ system_ bus_socket" pid=25608 comm="pool" requested_mask="rw" denied_mask="rw" fsuid=1000 ouid=0