arkadaşlar farklı temalarda sorun yok ama detube temasını kurduğumda ana sayfa sorunsuz açılıyor. yazılar sayfasına tıklayınca bu hatayı alıyorum

Fatal error: Uncaught Error: [] operator not supported for strings in /home/irj3f1ffjeh7/public_html/wp-content/themes/detube/functions.php:804 Stack trace: #0 /home/irj3f1ffjeh7/public_html/wp-content/themes/detube/header.php(34): dp_meta_keywords() #1 /home/irj3f1ffjeh7/public_html/wp-includes/template.php(688): require_once('/home/irj3f1ffj...') #2 /home/irj3f1ffjeh7/public_html/wp-includes/template.php(647): load_template('/home/irj3f1ffj...', true) #3 /home/irj3f1ffjeh7/public_html/wp-includes/general-template.php(41): locate_template(Array, true) #4 /home/irj3f1ffjeh7/public_html/wp-content/themes/detube/single.php(29): get_header() #5 /home/irj3f1ffjeh7/public_html/wp-includes/template-loader.php(74): include('/home/irj3f1ffj...') #6 /home/irj3f1ffjeh7/public_html/wp-blog-header.php(19): require_once('/home/irj3f1ffj...') #7 /home/irj3f1ffjeh7/public_html/index.php(17): require('/home/irj3f1ffj...') #8 {main} thrown in /home/irj3f1ffjeh7/public_html/wp-content/themes/detube/functions.php on line 804