Problem with setting up StakePool

So I have a problem when i come to point "Install Cabal and dependencies.
". Here is my error, Please take a look at screenshot. Does anybody knows where problem could be.

What operating system are you using? If it is Windows, then I strongly suggest to start using Linux - it’ll work on most distributions, but most people seem to use Ubuntu.

Hi. I use Ubuntu 16 on my server.

You should probably upgrade to 20.04.2 LTS which is the most recent LTS version. It’s quite likely that newer versions of Haskell are not working on Ubuntu from 2016.

Thnx that solved my problem. Now i stuck at this point.