Please do not glom on a forum post that is over a year and 1/2 old
Please start a new question and provide your plugin environment, which means everything including your site url that you believe is having issues.
Please read the posting guidelines for info needed when posting.
The issue was not SLP related, update your MYSQL
Update max_allowed_packet_size in the my.cnf file. On an Amazon RDS server this is easily done by editing your parameter group and changing that setting on the RDS server.