if you experience this error , shut off the firewall and/or cPHulk Brute Force protection :
/usr/local/cpanel/bin/cphulk_pam_ctl --disable
and kill old processes:
for i in `ps aux | grep -i "cphulkd - process" | awk {'print $2'}` ;do kill -9 $i ;done
And log in successfully.
Peace Out!
