I have no clue if this can help anyone, help me, but here is what I think I see in the logs.
Error - ...applications/classifieds/modules/front/classifieds/view.php(192): IPS\Theme\_SandboxedTemplate->__call()...
line 192 ...
\IPS\Output::i()->output = \IPS\Theme::i()->getTemplate( 'view' )->view( $this->advert, $commentsAndReviews, $this->advert->nextItem(), $this->advert->prevItem(), $cfields, $otherAdverts, $otherCatAdverts );
Error - ...applications/classifieds/modules/front/classifieds/view.php(59): IPS\Content\_Controller->execute()...
line 59
parent::execute();