ERROR: Field "category_head" or index 0 is not in result (q_FromDB)

1) /usr/www/users/herrenf/herrenbach-apotheke.de/magazin/ha-blog-artikel.php(15): require('/usr/www/users/...')
2) /usr/www/users/herrenf/herrenbach-apotheke.de/ha-main/q-web/q-web-page-templates/_ha-template-blog-article.php(88): q_FromDB('text', 'category_head', Array)