WHM shows below error for cPHulk Brute Force Protection :
cPHulk Mysql is currently disabled. To enable mysql go to: Service Manager, Error while connecting to MySQL for cPHULK, mysql error for cPHulk.
To resolve this error just execute the below command:
/usr/local/cpanel/bin/hulkdsetup
Duplicate column name 'SERVER'
Duplicate column name 'ISPREFIX'
Now just refresh the page and you will no more find that error.