When connecting to the MySQL screens in DirectAdmin, if this error appears, that would indicated that the “da_admin” user has not been setup correctly. Also you are reset the mysql root password too. To resolve this do the following.
mysqld_safe --skip-grant-tables &
That should start up mysql without the need for a root password. Once in, type
update user set Password=PASSWORD('newpass') where user='root';
GRANT ALL PRIVILEGES ON *.* TO 'da_admin'@'localhost' IDENTIFIED BY 'newpass' WITH GRANT OPTION;
Now we need to make sure it’s setup correctly for DA to use. Edit /usr/local/directadmin/conf/mysql.conf and set
Now edit the file /root/.my.cnf and add the following lines