Fatal error: Access level to Kufer\Web\Classes\Api\SearchRestriction\SearchRestrictionKatKennzOrFilter::cleanFilterKriterium() must be protected (as in class Kufer\Web\Classes\Api\SearchRestriction\SearchRestriction) or weaker in /www/htdocs/w0207743/koeln.site-testing.de/public/fileadmin/kuferweb/classes/api/sucheinschraenkung/SearchRestrictionKatKennzOrFilter.php on line 45