title: Package ‘stringr’ was installed before R 4.0.0: please re-install it BiocManager Installation path not writeable, unable to update packages
body: <p>Got the errors
  <code>Error : package ‘stringr’ was installed before R 4.0.0: please re-install it</code> and B<code>iocManager Installation path not writeable, unable to update packages:</code></p>
  <p>and further down the road rstudio gave me</p>
  <pre><code>/usr/local/lib/R/lib/libR.so not found
  </code></pre>