Undefined subroutine &main::webmin_user_is_admin called at /usr/share/usermin/authentic-theme/authentic-init.pl line 1748.

[alanmels]

Hi Ilia,

One one of our Ubuntu servers, the following error started to pop up when attempting to open Webmin:

Error — Perl execution failed

Undefined subroutine &main::webmin_user_is_admin called at /usr/share/usermin/authentic-theme/authentic-init.pl line 1748. 

So to fix that I executed:

/usr/share/webmin/update-from-repo.sh
/usr/share/webmin/authentic-theme/theme-update.sh

which didn't help.

According to /etc/webmin/webmin.acl the admin user is root. The content of two config files are given below:

cat /etc/webmin/config
logfiles=1
find_pid_command=ps auwwwx | grep NAME | grep -v grep | awk '{ print $2 }'
tempdelete_days=7
theme=authentic-theme
passwd_pindex=1
referers_none=1
os_version=11.0
by_view=0
path=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
real_os_version=20.04.4
lang=en
cache_mods=virtual-server
md5pass=1
real_os_type=Ubuntu Linux
product=webmin
cache_size=52428800
passwd_mindex=4
log=1
ld_env=LD_LIBRARY_PATH
passwd_uindex=0
passwd_cindex=2
os_type=debian-linux
mobile_theme=authentic-theme
webprefix=
passwd_file=/etc/shadow

and

cat /etc/webmin/miniserv.conf 
port=12953
addtype_cgi=internal/cgi
realm=Webmin Server
logfile=/var/webmin/miniserv.log
errorlog=/var/webmin/miniserv.error
pidfile=/var/webmin/miniserv.pid
logtime=168
ssl=1
no_ssl2=1
no_ssl3=1
no_tls1=1
no_tls1_1=1
ssl_honorcipherorder=1
no_sslcompression=1
env_WEBMIN_CONFIG=/etc/webmin
env_WEBMIN_VAR=/var/webmin
atboot=1
logout=/etc/webmin/logout-flag
listen=12953
denyfile=\.pl$
log=1
blockhost_failures=5
blockhost_time=60
syslog=1
ipv6=1
session=1
userfile=/etc/webmin/miniserv.users
keyfile=/home/hest/ssl/ssl.key
passwd_file=/etc/shadow
passwd_uindex=0
passwd_pindex=1
passwd_cindex=2
passwd_mindex=4
passwd_mode=0
preroot=authentic-theme
passdelay=1
logout_script=/etc/webmin/logout.pl
login_script=/etc/webmin/login.pl
failed_script=/etc/webmin/failed.pl
cipher_list_def=2
sudo=1
sessiononly=/virtual-server/remote.cgi
preload=virtual-server=virtual-server/virtual-server-lib-funcs.pl virtual-server=virtual-server/feature-unix.pl virtual-server=virtual-server/feature-dir.pl virtual-server=virtual-server/feature-dns.pl virtual-server=virtual-server/feature-mail.pl virtual-server=virtual-server/feature-web.pl virtual-server=virtual-server/feature-webalizer.pl virtual-server=virtual-server/feature-ssl.pl virtual-server=virtual-server/feature-logrotate.pl virtual-server=virtual-server/feature-mysql.pl virtual-server=virtual-server/feature-postgres.pl virtual-server=virtual-server/feature-ftp.pl virtual-server=virtual-server/feature-spam.pl virtual-server=virtual-server/feature-virus.pl virtual-server=virtual-server/feature-webmin.pl virtual-server=virtual-server/feature-virt.pl virtual-server=virtual-server/feature-virt6.pl
ssl_cipher_list=ECDHE-RSA-AES256-SHA384:AES256-SHA256:AES256-SHA256:RC4:HIGH:MEDIUM:+TLSv1:+TLSv1.1:+TLSv1.2:!MD5:!ADH:!aNULL:!eNULL:!NULL:!DH:!ADH:!EDH:!AESGCM
error_handler_403=403.cgi
error_handler_404=404.cgi
error_handler_401=401.cgi
nolog=\/stats\.cgi\?xhr\-stats\=general
premodules=WebminCore
extracas=/home/hest/ssl/ssl.ca
ssl_redirect=1
certfile=/home/hest/ssl/ssl.crt
no_tls1_2=
root=/usr/share/webmin
mimetypes=/usr/share/webmin/mime.types
server=MiniServ/1.99406082130

I know dev versions are not recommended, but I felt I should give a try to get around the error. Now, what's the best route for me? Если откатывать назад, то как именно?

Спасибо!

[iliajie]

Try running:

/etc/webmin/restart-by-force-kill

[iliajie]

Oh, wait. This is Usermin. In order to fix that for Usermin you need to upgrade Usermin via the script.

Also, to revert back, just reinstall Usermin package, like apt-get install --reinstall usermin.

[alanmels]

Wonderful, that made the trick. Thanks a lot, Ilia!