PhrictionDocumentTitleTransaction calls $this->renderHandleLink().
PhabricatorApplicationTransaction defines that method public function renderHandleLink($phid).
PhrictionDocumentTitleTransaction extends PhrictionDocumentVersionTransaction extends PhrictionDocumentTransactionType extends PhabricatorModularTransactionType extends Phobject. No PhabricatorApplicationTransaction in that ancestor tree. Thus this call will fail.
Thus replace renderHandleLink() with renderObject() as used in other getTitle() or getTitleForFeed() implementations.

Unclear how to trigger via the UI, so run static code analysis and read/grep the code.