Package: munin Version: 2.0.67-2 Followup-For: Bug #991411 Confirming that happens for me as well, breaking all munin functionality.
Very likely related to https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990371 -- System Information: Debian Release: 11.0 APT prefers testing-security APT policy: (500, 'testing-security'), (500, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 5.10.0-7-amd64 (SMP w/4 CPU threads) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages munin depends on: ii cron [cron-daemon] 3.0pl1-137 ii debconf [debconf-2.0] 1.5.77 ii fonts-dejavu-core 2.37-2 ii init-system-helpers 1.60 ii libdate-manip-perl 6.83-1 pn libdigest-md5-perl <none> ii libfile-copy-recursive-perl 0.45-1 ii libhtml-template-perl 2.97-1.1 ii libio-socket-inet6-perl 2.72-2.1 ii liblog-log4perl-perl 1.54-1 ii librrds-perl 1.7.2-3+b7 pn libstorable-perl <none> ii liburi-perl 5.08-1 ii lsb-base 11.1.0 ii munin-common 2.0.67-2 ii netbase 6.3 ii perl [libtime-hires-perl] 5.32.1-4 ii rrdtool 1.7.2-3+b7 ii systemd-sysv 247.3-6 Versions of packages munin recommends: ii libcgi-fast-perl 1:2.15-1 ii munin-doc 2.0.67-2 ii munin-node 2.0.67-2 Versions of packages munin suggests: ii apache2 [httpd] 2.4.48-3.1 ii firefox-esr [www-browser] 78.12.0esr-1 ii google-chrome-stable [www-browser] 92.0.4515.107-1 ii konqueror [www-browser] 4:20.12.0-4 pn libapache2-mod-fcgid <none> ii libnet-ssleay-perl 1.88-3+b1 ii links [www-browser] 2.21-1+b1 ii w3m [www-browser] 0.5.3+git20210102-6 -- Configuration Files: /etc/munin/apache.conf changed [not included] /etc/munin/munin.conf changed [not included] -- debconf information excluded