title: Vim colorscheme not appearing although successfully installed with vim-plug
body: <p>I have installed via <code>vim-plug</code> the <code>altercation/solarized</code> <a href="https://github.com/altercation/solarized" rel="nofollow noreferrer">colorscheme</a>.</p>
  <p>and here is my <code>~/.vimrc</code></p>
  <pre><code>call plug#begin('~/.vim/plugged')
  
  Plug 'preservim/nerdtree'
  Plug 'fatih/vim-go'
  Plug 'neoclide/coc.nvim', {'branch': 'release'}
  Plug 'lifepillar/vim-solarized8'
  Plug 'altercation/solarized'
  
  call plug#end()
  
  syntax on
  
  
  filetype indent plugin on
  
  let $NVIM_TUI_ENABLE_TRUE_COLOR=1
  
  set background=dark
  
  colorscheme solarized
  </code></pre>
  <p>However, when opening <code>vim</code>:</p>
  <pre><code>▶ vim ~/.vimrc
  Error detected while processing /Users/pantelis/.vimrc:
  line   20:
  E185: Cannot find colour scheme 'solarized'
  Press ENTER or type command to continue
  </code></pre>
  <p>Any idea why the color scheme cannot be found?</p>
  <p><strong>edit</strong>: just for the record, here is the output of <code>PlugStatus</code></p>
  <p><a href="https://i.stack.imgur.com/D4qEo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/D4qEo.png" alt="enter image description here" /></a></p>