Last night my Ubuntu 18 was fine although it was running a bit laggier than usual. After work, logged it off. The next morning I couldn't login since it goes into a black screen after entering the correct password and goes back to the login. I've tried logging in the login shell but I've had no luck as it does the same thing. I've managed to capture a picture of the error before it goes back to the shell login after entering the correct password. How does one fix this?
