Exception encountered, of type &quot;Error&quot;<br />
[7412b70b03f038cbebd6f1ee] /?title=Special:IntraACLSelftest&amp;do=1&amp;quiet=1   Error from line 78 of /var/www/mech1273/extensions/IntraACL/includes/SpecialSelftest.php: Call to a member function isBlank() on string<br />
Backtrace:<br />
#0 /var/www/mech1273/extensions/IntraACL/includes/SpecialSelftest.php(117): IntraACLSelftestSpecial::loadConfig()<br />
#1 /var/www/mech1273/extensions/IntraACL/includes/SpecialSelftest.php(64): IntraACLSelftestSpecial-&gt;doChecks(boolean)<br />
#2 /var/www/mech1273/includes/specialpage/SpecialPage.php(479): IntraACLSelftestSpecial-&gt;execute(NULL)<br />
#3 /var/www/mech1273/includes/specialpage/SpecialPageFactory.php(577): SpecialPage-&gt;run(NULL)<br />
#4 /var/www/mech1273/includes/MediaWiki.php(282): SpecialPageFactory::executePath(Title, RequestContext)<br />
#5 /var/www/mech1273/includes/MediaWiki.php(735): MediaWiki-&gt;performRequest()<br />
#6 /var/www/mech1273/includes/MediaWiki.php(509): MediaWiki-&gt;main()<br />
#7 /var/www/mech1273/index.php(43): MediaWiki-&gt;run()<br />
#8 {main}<br />