Systemd-analyze blame returns Bootup not finished

I am using a Dell Laptop with Ubuntu Budgie 19.04.

Whenever I run the command :

systemd-analyze blame 

it returns :

Bootup is not yet finished org.freedesktop.systemd1.Manager.FinishTimestampMonotonic=0).
Please try again later.

This, even if the computer booted hours ago and is working normally. Obviously, the boot process should have long terminated. Is this the sign of any boot or load problem?

The command :

systemctl list-jobs 

returns :

 JOB UNIT                                 TYPE  STATE  
  2                    start waiting
142 systemd-update-utmp-runlevel.service start waiting
 35 setvtrgb.service                     start waiting
155 plymouth-quit-wait.service           start running
151 getty@tty1.service                   start waiting
  1                     start waiting
149                         start waiting
152 system-getty.slice                   start waiting
3019 dev-disk-by\x2did-usb\x2dCICADA_FLASH_READER\x2d0:0.device start running