[Emergency] Uncaught Error: Class "ArrayData" not found

GET /blog/?category=5&start=3

Line 29 in /homepages/3/d341071295/htdocs/ss5-php8.1/app/src/Controller/BlogHolderController.php

Source

20 
21     public function index() {
22 
23       if ($this->request->getVar('category')) {
24         //$paginatedItems = new PaginatedList(BlogArtikel::get()->filter(array('ParentID' => $this->ID, 'RubrikID' => $this->request->getVar('category')))->sort('Date DESC'), $this->request);
25         $paginatedItems = new PaginatedList(BlogArtikel::get()->filter(array('ParentID' => $this->ID))->innerJoin("BlogArtikel_Rubriken", "\"BlogArtikel_Rubriken\".\"BlogRubrikID\" = " . $this->request->getVar('category') . " AND \"BlogArtikel\".\"ID\" = \"BlogArtikel_Rubriken\".\"BlogArtikelID\"")->sort('Date DESC'), $this->request);
26         $paginatedItems->setPageLength(3);
27 
28         return $this->customise(
29           new ArrayData(array(
30             'CurrentCategory' => $this->request->getVar('category'),
31             'PaginatedArticles' => $paginatedItems
32           )))->renderWith(array('BlogHolder', 'Page'));
33 
34       } else {
35         return $this;

Trace