Errors in an Access Control log
Problem
2015-12-02 15:16:50,664:11425:[VS_access_control.py:135]:ERROR:/var/run/mosquitto.pid does not exist
2015-12-02 15:16:50,666:11425:[VS_access_control.py:136]:ERROR:Can't make the access list persistent
This error alerts that mosquitto persistance is not properly configured.
Solution
Configure mosquitto persistance
The access list will be persisted anyways if the Persistor daemon is running.