Thread:Extension talk:Scribunto/red Script error unclickable/reply (3)

The getTitle method for frame objects is added in the version of Scribunto for MediaWiki 1.23. Earlier versions of Scribunto do not have this, which would give the error you report.

Note also that Scribunto for MediaWiki 1.23 won't work with earlier versions of MediaWiki, so you'd have to upgrade both if you want to use this method. Or you could try backporting 99797 locally.