I set up a local Ikiwiki following the instruction on manually installing. However, when I Git push, I see the following

$ git push
Counting objects: 22, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (22/22), done.
Writing objects: 100% (22/22), 2.71 KiB | 0 bytes/s, done.
Total 22 (delta 14), reused 0 (delta 0)
remote: Died at /usr/share/perl5/IkiWiki/CGI.pm line 491.
remote: Content-type: text/html
remote: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"

where the content at the bottom of the console printout is actually the content of my rootdir/index.mdwn. And the destination, i.e. the deployed web documents is not automatically updated reflecting the commits I pushed to Git repo. Any idea?

I'm using ikiwiki version 3.20150107 on Ubuntu Linux 14.0.4 LTS.