Topic on Extension talk:Wiretap

On https://demo.qualitybox.us/wiki/Special:Wiretap?requestDebug=true&useskin=vector

I get Fatal error: Call to undefined method SkinVector::link() in /opt/htdocs/mediawiki/extensions/Wiretap/SpecialWiretap.php on line 528

That line is

$page = $this->getSkin()->link( $pageTitle );

I tried inserting a 'context' (property) or getContext() method into the chain, but that too errored:

$page = $this->getContext->getSkin()->link( $pageTitle );

I could only find a 'link' method in the Linker class. https://doc.wikimedia.org/mediawiki-core/master/php/classLinker.html#ad97e40cfea2343c5cae8307cf1fe47a4