My instance LightSail crash - Connexion failed on my https websites

Hello,

I had configured my instance with two website and two environment for them, everything worked and today my instance is not working anymore.

http://35.181.49.244/ redirect to apache page now.

Websites : https://ec2022.mozvox.com/ https://www.mozvox.com/ have a connexion failed.

When I try to restart services with ssh :

sudo /opt/bitnami/ctlscript.sh restart
Restarting services..
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

When I try to enable sshd :

sudo systemctl enable sshd
Created symlink sshd.service → (null).
Failed to enable: Too many levels of symbolic links.

My hard disk is not empty :

df -hT /dev/xvda1
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/xvda1     ext4   20G  4.6G   15G  25% /

What can be the problem ?

Thanks for your reply.