Follow the instructions below especially made for your system according to the snapshot that you sent me.
First take a another snapshot. I will only serve to retrieve your service configuration file and your personal frontend. Do it for root and regular user.
Note you can do the following procedure without chrooting your system.
# 66 snapshot create save_configuration
% 66 snapshot create save_configuration
remove any directory found at /var/lib/66/ except the .snapshot one. Remove the /var/log/66 directory entirely. Remove any directories found at /etc/66/ but do not remove the init.conf, rc.init, rc.init.container, rc.local, rc.shutdown and rc.shutdown.final files.
Activate the boot@system service
# 66 enable boot@system
Copy the file /var/lib/66/.snapshot/save_configuration/etc/66/conf/boot@system/3.8.0/boot@system to /etc/66/conf/boot@system/3.8.0/boot@system, then reconfigure the boot@system
# 66 reconfigure boot@system
Check the value to be sure that it correspond to your need, in particular the BTRFS one.
# 66 configure -L boot@system
Copy your /var/lib/66/.snapshot/save_configuration/etc/66/service/mullvad-daemon and /var/lib/66/.snapshot/save_configuration/etc/66/service/wg-kv frontend files to /etc/66/service. Activate the services for your global tree
# 66 enable dbus consolekit openntpd sddm networtmanager mullvad-daemon wg-kv
Activates services for your session tree replacing myuser by the good one and administrates the tree
# 66 -t session enable boot-user@myuser
# 66 tree admin -o depends=global session
# 66 tree enable session
Activates services for your virt tree and administrates the tree
# 66 -t virt enable libvirtd virtlockd-socket virtlogd virtlockd libvirtd-socket
# 66 admin -o depends=global virt
# 66 tree enable virt
We are done for the root part.
Remove the $HOME/.66 directory entirely except the $HOME/.66/.snapshot directory.
Creates and administrate the trees
% 66 tree create noise-gate
% 66 tree create audio
% 66 tree create sync
% 66 tree enable noise-gate
% 66 tree enable audio
% 66 tree enable sync
% 66 tree admin -o depends=global:requiredby=noise-gate audio
% 66 tree admin -o depends=global sync
Copy your $HOME/.66/.snapshot/save_configuration/.66/service/pipewire-input-filter-chain and $HOME/.66/.snapshot/save_configuration/.66/service/syncthing to $HOME/.66/service.
Activates services for your global tree replacing myuser by the good one
% 66 enable dbus@mysuser xdg-user-dirs
Activates services for your audio tree
% 66 -t audio enable wireplumber pipewire-pulse pipewire
Activates services for your noise-gate tree
% 66 -t noise-gate enable pipewire-input-filter-chain
Activates service for your sync tree
% 66 -t sync enable syncthing
You are done. You can do some check with
# 66 tree status -g
% 66 tree status -g
You can reboot.
