Disable ONLY_FULL_GROUP_BY

on ubuntu

1.  sudo nano/etc/mysql/mysql.conf.d/mysqld.cnf.

2. [mysqld]  
   sql_mode = "STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,
   ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,
   NO_ENGINE_SUBSTITUTION"