Custom plugin: "The JSON response from the API could not be parsed"

Thank you very much. For the code from the docs it helped.

But my real problem was, that my tags code

... // some code

      'html' => function($tag) {

        $subpages = $tag->parent()->children();
        if($children == 'visible') {
          $subpages = $subpages->visible();
        } elseif($children == 'invisible') {
          $subpages = $subpages->invisible();
        }

... // some code

had some deprecated code, which I did not get reported although debug was enabled.

But that is another storry.
And I have this code now updatet too :sweat_smile: