Plesk is not accessible,
psa service fails to start with the error:
# /etc/init.d/psa start
Starting psa... Starting sw-engine-fpm: [29-May-2014 23:44:34] ERROR: failed to open error_log (/var/log/sw-cp-server/sw-engine.log): No such file or directory (2)
ERROR: failed to post process the configuration
directory is missing on the server.
# mkdir /var/log/sw-cp-server/
# service psa start