Kubuntu 18.04, on startup only tty screen showing up

Ubuntu
5

Hey, I followed the instructions on the link you had sent me (How to Install the KDE Plasma Desktop on Ubuntu 18.04 LTS – VITUX)
It asked me to install tasksel and then the kubuntu-desktop and sddm

I followed the steps given but I’ve got some errors that I don’t know how to solve. Here they are:
In tty1, after logging in to my account
On sudo apt install tasksel :

IMG_20190807_225706
IMG_20190807_2257064160×2340 1.89 MB

I request you to please help me out, I have not been able to find any solution on net that works for me.

Thanks,
Divyansh