title: install reviewboard problem: when I run localhost:8001, there is "reviewboard.admin.siteconfig" error in the /var/log/apache2/error.log
body: <p>Recently, I want to install reviewboard software，I install apache、mod_wsgi、mysql，I configure the port = 8001. but when I run the  localhost:8001 in the firefox,  it shows like below:
  **It appears something broke when you tried to go to here. This is either a bug in Review Board or a server configuration error. Please report this to your administrator. **</p>
  <p>in the /var/log/apache2/error.log, it shows
  &quot;[wsgi:error] [pid 6740:tid 140210616661760] [client 127.0.0.1:39542] No handlers could be found for logger &quot;reviewboard.admin.siteconfig&quot;&quot;</p>
  <p>I have searched many resources, I still don't know why it happened?</p>