wordpress search bar not working

Does this site have any posts to search on?  All I can see is one very long page?

There's no posts, just the 3 pages listed across the top menu of the home page.

1. http://nlpwiki.org/wiki

2. http://nlpwiki.org/35-years-revisited-3

3. http://nlpwiki.org/submission-contact-form

Default WordPress search doesn't search pages...just posts.  You need to add a plugin like Relevanassi to get pages to be searchable.

Installed Relevanassi, but it's not working.

I activated it, deactivated it, and activated it again as instructions said.

There is not a query_posts() call in the search results file.

I built and index and saved it.

No luck yet.

www.nlpwiki.org

Switch to a different theme and test search again...

Tried on 3 different themes and didn't work. By the way, our home page is a wiki using this plugin:

https://premium.wpmudev.org/project/wordpress-wiki/

The other 2 pages are Wordpress "Pages"

When I built an index, it indexed all 3 pages.

What's next?

If you disable the plugin, does it work?

I just added two test posts, disabled the plugin, and it still didn't work. Tried 2 different themes no luck. It must be the wiki plugin. Do you know what steps I can take?

Thanks Jason, I appreciate the help