title: Internal Server Error right after installation of OpenERP 7.0
body: <p>I am new at OpenERP and I just installed OpenERP 7.0 on Ubuntu 12.04 using the All-In-One ".deb" file. But when I tried to open it it gave me this error message:</p>
  
  <blockquote>
    <p>Internal Server Error: The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.</p>
  </blockquote>
  
  <p>I checked the "openerp-server.log" file and it gave me this:</p>
  
  <pre><code>    self.gen.next()
  File "/usr/share/pyshared/openerp/addons/web/http.py", line 422, in session_context
  session_store.save(request.session)
  File "/usr/share/pyshared/werkzeug/contrib/sessions.py", line 237, in savedir=self.path)
  File "/usr/lib/python2.7/tempfile.py", line 300, in mkstemp
  return _mkstemp_inner(dir, prefix, suffix, flags)
  File "/usr/lib/python2.7/tempfile.py", line 235, in _mkstemp_inner
  fd = _os.open(file, flags, 0600)
  OSError: [Errno 13] Permission non accordée: '/tmp/oe-sessions-openerp/tmpNUQsbf.__wz_sess'
  </code></pre>
  
  <p>What is going wrong and how can I fix it?</p>
  
  <p>Thanks!</p>