All contents disappear after BOGO activation

Hi, this plug-in is really wonderful. I love and would like to install it on my blog.
But unfortunately it doesn’t work on my wp. I don’t know why…
Issues is as follows.

My blog itself works well. After install BOGO and activate it, error message appeared.
“Nothing Found
It seems we can’t find what you’re looking for. Perhaps searching can help.”

All blog contents seems to disappear.
Of course contents are stored, so after I do deactivation, contents can be seen on web.

How can I resolve my issue?
Thanks,