error after install

[bwanaaa]

I followed the docs here

https://beginners-guide-to-xmonad.readthedocs.io/

ran 'xmonad' in terminal and got this

 $xmonad
XMonad is recompiling and replacing itself another XMonad process because the current process is called "xmonad" but the compiled configuration should be called "xmonad-x86_64-linux"
XMonad will use ghc to recompile, because "/home/stefan/.xmonad/build" does not exist.
XMonad skipping recompile because it is not forced (e.g. via --recompile), and neither xmonad.hs nor any *.hs / *.lhs / *.hsc files in lib/ have been changed.
X Error of failed request:  BadAccess (attempt to access private resource denied)
  Major opcode of failed request:  2 (X_ChangeWindowAttributes)
  Serial number of failed request:  7
  Current serial number in output stream:  8
stefan@4930:~$ Fields missing from config defaulted: additionalFonts,textOffset,iconOffset,allDesktops,overrideRedirect,pickBroadest,hideOnStart,lowerOnStart,persistent,iconRoot,alpha
<stdin>: hGetLine: end of file

and terminal has choked - no prompt

I had initially installed xmonad according to the haskell blog here:

https://xmonadhaskell.wordpress.com/2018/10/22/xmonad-ubuntu-18-04-install/

and when this happened, i tried

sudo apt-get install xmonad suckless-tools xscreensaver

and repeated all the steps.

I still dont know how to use xmonad and win-shift -enter does not start a terminal either.