Your MySQL server is down or not working. Please login to root SSH and run this command to restart it; /etc/rc.d/init.d/mysql restart
If you are still receiving mysql error after SSH restart, use the mysql root password function on your WHM root >> left menu under the SQL services and reset the password.
Sorunu bir türlü düzeltemezseniz bize buradan aldığınız hatayı yazınız.