SmartCrawl error to post new or updated article

My website was normal, after install WPMU plugin, I modify an article and receive the message error:

The eusouandroid.com page isn’t working

eusouandroid.com didn’t send any data.

ERR_EMPTY_RESPONSE

http://prntscr.com/c0u6nf

I deactivated WPMU plugin, one by one, until that found plugin that happend this. Is SmartCrawl.

I deactivated SmartCrawl and don’t receiv more error.

Have solution for this?