Board Thread:Support Requests - Getting Technical/@comment-31924693-20170414183805

On the Beatles Wiki, I am trying to find all pages where users have linked to Wikipedia using long format (en.wikipedia.org) instead of short format (wikipedia:). According to a thread on the AWB talk page, the way to do it is to use Wiki search (text) with the parameter insource:/en.wikipedia.org/. But when I do this, I get an error saying that text search is disabled! Can I enable it? How do I proceed?  