I also saw this in the journal just now:
Jul 28 13:19:39 fbox /usr/bin/plinth[551]: Error running action plinth..install(app_id="email", packages=["postfix", "postfix-sqlite", "dovecot-pop3d", "dovecot-imapd", "dovecot-lmtpd", "dovecot-managesieved", "dovecot-ldap", "rspamd", "redis-server", "openssl"], skip_recommends=false, force_configuration=null, reinstall=false, force_missing_configuration=false): RuntimeError("Apt command failed with return code: 100")
Stdout:
│ Setting up linux-image-6.1.0-35-armmp-lpae (6.1.137-1) ...
│ freedombox set on hold.
Stderr:
║ Initialized apps - apache, api, names, avahi, storage, backups, cockpit, firewall, config, datetime, diagnostics, dynamicdns, first_boot, help, letsencrypt, networks, power, privacy, security, snapshot, ssh, sso, upgrades, users, bepasty, bind, calibre, coturn, deluge, ejabberd, email, featherwiki, gitweb, gnome, ikiwiki, infinoted, janus, jsxc, kiwix, matrixsynapse, mediawiki, minetest, minidlna, miniflux, mumble, nextcloud, openvpn, pagekite, performance, privoxy, quassel, radicale, roundcube, rssbridge, samba, searx, shaarli, shadowsocks, shadowsocksserver, sharing, sogo, syncthing, tiddlywiki, tor, torproxy, transmission, ttrss, wireguard, wordpress, zoph
║ /etc/kernel/postinst.d/initramfs-tools:
║ update-initramfs: Generating /boot/initrd.img-6.1.0-35-armmp-lpae
║ W: No zstd in /usr/bin:/sbin:/bin, using gzip
║ grep: /boot/config-6.1.0-35-armmp-lpae: No such file or directory
║ E: gzip compression (CONFIG_RD_GZIP) not supported by kernel
║ update-initramfs: failed for /boot/initrd.img-6.1.0-35-armmp-lpae with 1.
║ run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
║ dpkg: error processing package linux-image-6.1.0-35-armmp-lpae (--configure):
║ installed linux-image-6.1.0-35-armmp-lpae package post-installation script subprocess returned error exit status 1
║ Errors were encountered while processing:
║ linux-image-6.1.0-35-armmp-lpae
║ quota not working (qgroup not set)
║ Config is in use.
║ E: Sub-process /usr/bin/dpkg returned an error code (1)
║ quota not working (qgroup not set)
║ Config is in use.
║ E: Sub-process /usr/bin/dpkg returned an error code (1)
Action traceback:
╞ File "/usr/lib/python3/dist-packages/plinth/actions.py", line 398, in _privileged_call
╞ return_values = func(*arguments['args'], **arguments['kwargs'])
╞ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
╞ File "/usr/lib/python3/dist-packages/plinth/privileged/packages.py", line 70, in install
╞ raise RuntimeError(
Jul 28 13:19:39 fbox /usr/bin/plinth[551]: Error installing package: Apt command failed with return code: 100
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/plinth/package.py", line 394, in install
privileged.install(**kwargs)
File "/usr/lib/python3/dist-packages/plinth/actions.py", line 73, in wrapper
return _run_privileged_method_as_process(func, module_name,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/plinth/actions.py", line 134, in _run_privileged_method_as_process
return _wait_for_return(*wait_args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/plinth/actions.py", line 191, in _wait_for_return
raise exception
RuntimeError: Apt command failed with return code: 100
Jul 28 13:19:39 fbox /usr/bin/plinth[551]: Setup completed: email: Error updating app: {exception} Apt command failed with return code: 100
Jul 28 13:19:41 fbox apache-access[1236]: metani.eu:443 80.215.152.32 - - [28/Jul/2025:13:19:36 +0200] "GET /plinth/apps/email/ HTTP/2.0" 200 4993 "https://metani.eu/plinth/apps/email/" "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.13.0"
Jul 28 13:19:41 fbox /usr/bin/plinth[551]: Error running setup - Apt command failed with return code: 100
Jul 28 13:19:41 fbox /usr/bin/plinth[551]: Unable to complete setup: Apt command failed with return code: 100
Jul 28 13:19:41 fbox /usr/bin/plinth[551]: Will try again in 10 seconds
Because of the grep error on /boot, I looked at it
$ ls -l /boot
total 94688
-rw-r--r-- 1 root root 83 Aug 8 2023 System.map-6.1.0-11-armmp-lpae
-rw-r--r-- 1 root root 83 May 22 20:32 System.map-6.1.0-37-armmp-lpae
-rw-r--r-- 1 root root 83 May 8 2023 System.map-6.1.0-9-armmp-lpae
-rw-r--r-- 1 root root 2627 Jul 9 07:06 boot.scr
-rw-r--r-- 1 root root 2627 Jun 27 06:29 boot.scr.bak
-rw-r--r-- 1 root root 274400 Aug 8 2023 config-6.1.0-11-armmp-lpae
-rw-r--r-- 1 root root 274465 May 22 20:32 config-6.1.0-37-armmp-lpae
-rw-r--r-- 1 root root 274302 May 8 2023 config-6.1.0-9-armmp-lpae
lrwxrwxrwx 1 root root 56 Jul 9 07:06 dtb -> dtbs/6.1.0-37-armmp-lpae/./sun7i-a20-olinuxino-lime2.dtb
lrwxrwxrwx 1 root root 56 Jul 1 2024 dtb-6.1.0-11-armmp-lpae -> dtbs/6.1.0-11-armmp-lpae/./sun7i-a20-olinuxino-lime2.dtb
lrwxrwxrwx 1 root root 56 Jul 9 07:06 dtb-6.1.0-37-armmp-lpae -> dtbs/6.1.0-37-armmp-lpae/./sun7i-a20-olinuxino-lime2.dtb
lrwxrwxrwx 1 root root 55 Sep 3 2023 dtb-6.1.0-9-armmp-lpae -> dtbs/6.1.0-9-armmp-lpae/./sun7i-a20-olinuxino-lime2.dtb
drwxr-xr-x 16 root root 1024 Jun 27 06:28 dtbs
-rw-r--r-- 1 root root 26450528 Jul 1 2024 initrd.img-6.1.0-11-armmp-lpae
-rw-r--r-- 1 root root 26512396 Jul 9 07:06 initrd.img-6.1.0-37-armmp-lpae
-rw-r--r-- 1 root root 26434724 Sep 3 2023 initrd.img-6.1.0-9-armmp-lpae
drwx------ 2 root root 12288 Jun 15 2023 lost+found
-rw-r--r-- 1 root root 5403136 Aug 8 2023 vmlinuz-6.1.0-11-armmp-lpae
-rw-r--r-- 1 root root 5517824 May 22 20:32 vmlinuz-6.1.0-37-armmp-lpae
-rw-r--r-- 1 root root 5403136 May 8 2023 vmlinuz-6.1.0-9-armmp-lpae
Nevertheless, the Pioneer is booting fine, and other services like ejabberd or radicale work fine.