title: Blackboard not importing Blackboard.zip
body: <p>I'm trying to import the Blackboard.zip file created by r/exams but I got the following warning</p>
  <blockquote>
  <pre><code>Dec 10, 2020 2:00:36 PM - [FATAL] Fatal: An error has occurred. The error recorded is:
    The .zip file you provided failed to import. Please try again with a new file.
    For more information, see the detailed log.
  Dec 10, 2020 2:00:36 PM - [WARNING] Status: The operation import did not complete.
  </code></pre>
  </blockquote>
  <p>I thought that it was problem of my R installation, and tried to import the file given in <a href="http://www.r-exams.org/assets/posts/2018-04-16-exams2blackboard//blackboard.zip" rel="nofollow noreferrer">http://www.r-exams.org/assets/posts/2018-04-16-exams2blackboard//blackboard.zip</a></p>
  <p>and even so I get the same error message.</p>
  <p>Does anyone knows what is happening? I even try to import a QTI 2.1 file generated by exams package and same error.</p>
  <p>I really appreciate any help.</p>