Failed to add /run/systemd/ask-password to directory watch: No space left on device

Solution :

echo 1048576 > /proc/sys/fs/inotify/max_user_watches

The long-term fix is to edit the file /etc/sysctl.conf to include the line:

fs.inotify.max_user_watches=1048576

Reload Kernel.

sysctl -p

Reload settings from all system configuration files.

Type the following command to reload settings from config files without rebooting the box:

sysctl --system