Snap is unusable due to missing files

Please help. I am near to smash my own computer.

I am blocked after installing snapd with apt install snapd with this message

sudo snap install core
error: cannot perform the following tasks:
- Mount snap "core" (12821) (snap is unusable due to missing files; contact developer)

of course i tried with

sudo apt update && sudo apt upgrade
sudo apt purge snapd && sudo apt install snapd

But same result.

The result of snap --version

snap    2.49-1+deb11u1
snapd   2.49-1+deb11u1
series  16
debian  -
kernel  5.16.0-3-amd64

When i go with the following above I am again stuck. Please… help!!!

root@debian:/snap# journalctl -u snapd
mar 02 21:38:24 debian systemd[1]: Starting Snap Daemon...
mar 02 21:38:24 debian snapd[2425]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus, network
mar 02 21:38:24 debian snapd[2425]: daemon.go:347: started snapd/2.49-1+deb11u1 (series 16; classic; devmode) debian/ (amd64) linux/5.16.0-3-amd64.
mar 02 21:38:24 debian snapd[2425]: daemon.go:440: adjusting startup timeout by 30s (pessimistic estimate of 30s plus 5s per snap)
mar 02 21:38:24 debian snapd[2425]: helpers.go:137: error trying to compare the snap system key: system-key missing on disk
mar 02 21:38:24 debian systemd[1]: Started Snap Daemon.
mar 02 21:38:29 debian snapd[2425]: daemon.go:589: gracefully waiting for running hooks
mar 02 21:38:29 debian snapd[2425]: daemon.go:591: done waiting for running hooks
mar 02 21:38:29 debian snapd[2425]: daemon stop requested to wait for socket activation
mar 02 21:38:29 debian systemd[1]: snapd.service: Deactivated successfully.
mar 02 21:38:47 debian systemd[1]: Starting Snap Daemon...
mar 02 21:38:47 debian snapd[2518]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus, network
mar 02 21:38:47 debian snapd[2518]: patch.go:64: Patching system state level 6 to sublevel 1...
mar 02 21:38:47 debian snapd[2518]: patch.go:64: Patching system state level 6 to sublevel 2...
mar 02 21:38:47 debian snapd[2518]: patch.go:64: Patching system state level 6 to sublevel 3...
mar 02 21:38:47 debian snapd[2518]: daemon.go:347: started snapd/2.49-1+deb11u1 (series 16; classic; devmode) debian/ (amd64) linux/5.16.0-3-amd64.
mar 02 21:38:47 debian snapd[2518]: daemon.go:440: adjusting startup timeout by 30s (pessimistic estimate of 30s plus 5s per snap)
mar 02 21:38:47 debian systemd[1]: Started Snap Daemon.
mar 02 21:38:47 debian snapd[2518]: api.go:383: Installing snap "android-studio" revision unset
mar 02 21:38:52 debian snapd[2518]: daemon.go:589: gracefully waiting for running hooks
mar 02 21:38:52 debian snapd[2518]: daemon.go:591: done waiting for running hooks
mar 02 21:38:52 debian snapd[2518]: daemon stop requested to wait for socket activation
mar 02 21:38:52 debian systemd[1]: snapd.service: Deactivated successfully.
mar 02 21:38:53 debian systemd[1]: Starting Snap Daemon...
mar 02 21:38:53 debian snapd[2550]: AppArmor status: apparmor is enabled but some kernel features are missing: dbus, network
mar 02 21:38:53 debian snapd[2550]: daemon.go:347: started snapd/2.49-1+deb11u1 (series 16; classic; devmode) debian/ (amd64) linux/5.16.0-3-amd64.
mar 02 21:38:53 debian snapd[2550]: daemon.go:440: adjusting startup timeout by 30s (pessimistic estimate of 30s plus 5s per snap)
mar 02 21:38:53 debian systemd[1]: Started Snap Daemon.
mar 02 21:38:53 debian snapd[2550]: api.go:383: Installing snap "android-studio" revision unset
mar 02 21:39:18 debian snapd[2550]: container.go:215: in snap "snapd": path "." does not exist
mar 02 21:39:18 debian snapd[2550]: container.go:215: in snap "snapd": path "meta" does not exist
mar 02 21:39:18 debian snapd[2550]: container.go:215: in snap "snapd": path "meta/snap.yaml" does not exist
mar 02 21:39:18 debian snapd[2550]: taskrunner.go:271: [change 2 "Mount snap \"snapd\" (14978)" task] failed: snap is unusable due to missing files; >
mar 02 21:39:18 debian systemd[1]: snapd.service: Got notification message from PID 2692, but reception only permitted for main PID 2550
mar 02 21:39:20 debian snapd[2550]: handlers.go:496: Reported install problem for "snapd" as d4dc9f2e-9a68-11ec-92b4-fa163e983629 OOPSID
mar 02 21:40:12 debian snapd[2550]: api.go:383: Installing snap "android-studio" revision unset

is this perhaps related to:

(or one of the other “unusable due to missing files” threads in the forum)

Already saw that post but i’ve not found nothing useful there. By the way I solved because I found a way to install flutter without snapd with manual clone and configuration.