Maintenance mode, root password not working

What type of hardware are you using: Raspberry Pi 3, 4+
What YunoHost version are you running: latest a month ago
How are you able to access your server: Direct access via physical keyboard/screen
Are you in a special context or did you perform specific tweaking on your YunoHost instance ?: I guess current off for a long period when I wasn’t home

Describe your issue

I got a screen plug and the rasp4B doesn’t launch. It went directly into maintenance mode asking for root password or ctrl+D.

When I press the latest, it then reboot in maintenant.

Is the root password, the same than the one to go into SUDO or SU ? (doubting about myself ^^')

And then I’ve seen people sayning need to change the boot option.

But I run on SD, and my guess would be that SD is dying, is that possible ? Is there a way to change that or recover from the SD ? ^^’

Thank you !

Share relevant logs or error messages

[OK] mount boot.mount - /boot
[OK] reach target network.target - Network is online (skipping lines on purpose)
[OK] started rpc-statd-notified.service - notify NFS peers of a restart.
You are in emergency mode.
To boot in default mode, use password root …