I'm trying to install drivers for my Epson Perfection V370.

I've downloaded the driver from the Epson site to my Desktop.  

Opened a terminal which is by default pointed at the Desktop.  

Ran (as noted from the read me within the driver package). 

```
tar xaf iscan-perfection-v370-bundle-2.30.4.x64.deb.tar.gz \
   cd iscan-perfection-v370-bundle-2.30.4.x64.deb \
   ./install.sh

```

This is copied from the terminal, 

```
~/Desktop $ tar xaf iscan-perfection-v370-bundle-2.30.4.x64.deb.tar.gz
~/Desktop $    cd iscan-perfection-v370-bundle-2.30.4.x64.deb
~/Desktop/iscan-perfection-v370-bundle-2.30.4.x64.deb $    ./install.sh
[sudo] password for graham: 
Hit:1 http://gb.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://gb.archive.ubuntu.com/ubuntu focal-updates InRelease
Ign:3 http://gb.archive.ubuntu.com/ubuntu disco-updates InRelease
Hit:4 http://gb.archive.ubuntu.com/ubuntu focal-backports InRelease
Err:5 http://gb.archive.ubuntu.com/ubuntu disco-updates Release
  404  Not Found [IP: 91.189.88.142 80]
Hit:6 http://security.ubuntu.com/ubuntu focal-security InRelease
Reading package lists... Done                    E: The repository 'http://gb.archive.ubuntu.com/ubuntu disco-updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
~/Desktop/iscan-perfection-v370-bundle-2.30.4.x64.deb $ 

```

No idea what it means or if it installed correctly, when i run 'document scanner' app i get a 'no scanner available' message and i need to install drivers?

Do i need to do something more, if so what?