KISSmyOS, 1 year ago (edited 1 year ago)

In the grub menu, choose advanced options and then choose an older kernel to boot into.
If that boots fine, remove and reinstall the newest installed kernel and run sudo update-grub.
That should be the easiest way to fix the most possible causes of this error.

Edit: Now would be a very good time to back up all your data to an external drive. This might be a sign of your hard drive failing.