No I did not make any changes.
Here's how to fix it.
Edit the file /etc/mysql/my.cnf
Find a line that reads "log_bin" and remove or comment it as follows:
#log_bin = /var/log/mysql/mysql-bin.log
You also need to remove or comment following lines:
#expire_logs_days = 10
#max_binlog_size = 100M
Close and save the file. Finally, restart mysql server:
# service mysql restart