title: Can't install any package ( Error in readRDS(dest) : error reading from connection )
body: <p>For a week I've been trying to install packages, but an error message keeps occuring : Error in readRDS(dest) : error reading from connection.</p>
  
  <p>I had never seen this message before and I haven't done any update in-between.</p>
  
  <p>Here is what I do :</p>
  
  <ul>
  <li><p>I open R version 3.4.4 (but I've tried with 3.4.2 and 3.4.3 too)</p></li>
  <li><p>I click on packages -> install packages</p></li>
  <li><p>I choose a mirror (France Paris 2, but I've tried many others)</p></li>
  <li><p>I choose a package (I wanted to install foreach, but I have the same message with any package)</p></li>
  <li><p>Then I have this message "Error in readRDS(dest) : error reading from connection"</p></li>
  <li><p>If I click again on packages -> install packages, I instantly have the same message "Error in readRDS(dest) : error reading from connection"</p></li>
  </ul>
  
  <p>I run R as administrator. I've tried uninstalling /re-installing R, with different versions (from 3.4.2 to 3.4.4). Note that I work in an office, on a server, but my colleagues doesn't have any problem installing packages.</p>