I solved now a similar problem deleting file /usr/local/cwp/php71/etc/php-fpm.d/users/xxx.conf where xxx is the deleted user.
I am using Centos-Webpanel Pro, and it have a bug when account is deleted.
After removing the user.conf of deleted user, i ran systemctl start cwp-phpfpm and everything is working now.
Solved..Thanks Jae.. My Panel is running now..
With latest cwp7, This can happen after suspend user
Cause : cwp-phpfpm failed to start
Temporary solution delete file /usr/local/cwp/php71/etc/php-fpm.d/users/suspendenuser.conf
systemctl start cwp-phpfpm
will bring your wonderfull cwp running again..