Fatal error: Uncaught Error: Call to undefined function has_category_thumbnail() in /homepages/6/d259924059/htdocs/kiga/kiga_2018/wp-content/themes/melanchthon/functions.php:168 Stack trace: #0 /homepages/6/d259924059/htdocs/kiga/kiga_2018/wp-content/themes/melanchthon/index.php(3): thiesm__get_main_img() #1 /homepages/6/d259924059/htdocs/kiga/kiga_2018/wp-includes/template-loader.php(106): include('/homepages/6/d2...') #2 /homepages/6/d259924059/htdocs/kiga/kiga_2018/wp-blog-header.php(19): require_once('/homepages/6/d2...') #3 /homepages/6/d259924059/htdocs/kiga/kiga_2018/index.php(17): require('/homepages/6/d2...') #4 {main} thrown in /homepages/6/d259924059/htdocs/kiga/kiga_2018/wp-content/themes/melanchthon/functions.php on line 168