I'm running Ubuntu 20.04 on VMBox and am trying to get the most out of Vim. So I as following this guide
<https://techinscribed.com/how-to-set-up-vim-as-an-ide-for-react-and-typescript-in-2020/>
to install different plugins, starting with gruvbox. Unfortunately, neither gruvbox nor any other plugins worked, even though I followed the guide to the letter.
So here's my .vimrc file in my home folder:

```
call plug#begin()
" This is where we will add plugins to install

Plug 'morhetz/gruvbox'

call plug#end()

colorscheme gruvbox

```

And here are the error messages:

```
Error detected while processing /home/marcel/.vim/plugged/gruvbox/colors/gruvbox.vim:
line    8:
E492: Not an editor command: ^M
line   11:
E492: Not an editor command: ^M
line   12:
E15: Invalid expression: version > 580^M
line 1419:
E171: Missing :endif
Press ENTER or type command to continue

```

Similar errors happen with any other plugin... I already tried a different color scheme and also the NERDtree. Is this a known issue? How can I alleviate the problem?