I have one problem with sudo. When I run sudo in regular account I get:

sudo: PERM_ROOT: setresuid(0, -1, -1): Permission denied
sudo: error initializing audit plugin sudoers_audit

But I commented the line where was written Plugin audit in /etc/sudo.conf. And here is my /etc/sudoers:

#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults        env_reset
Defaults        mail_badpass
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL
running ALL=(ALL:ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "@include" directives:

@includedir /etc/sudoers.d
root ALL=(ALL:ALL) NOPASSWD:ALL
running ALL=(ALL:ALL) NOPASSWD:ALL

Note that sudo works without problem in root account but only fails at regular account(regular account is running here.)

How can I solve this??