Американский питбультерьер

Fatal error: Uncaught TypeError: Argument 2 passed to replaceSameFirstHeadingAsArticleName() must be of the type string, null given, called in /var/www/zootovary/data/www/zootovary.com/templates/content/article_info.tpl.php on line 129 and defined in /var/www/zootovary/data/www/zootovary.com/includes/functions/articles.php:369 Stack trace: #0 /var/www/zootovary/data/www/zootovary.com/templates/content/article_info.tpl.php(129): replaceSameFirstHeadingAsArticleName('\xD0\x90\xD0\xBC\xD0\xB5\xD1\x80\xD0\xB8\xD0\xBA\xD0\xB0\xD0...', NULL) #1 /var/www/zootovary/data/www/zootovary.com/templates/solo/main_page.tpl.php(687): require('/var/www/zootov...') #2 /var/www/zootovary/data/www/zootovary.com/article_info.php(117): require('/var/www/zootov...') #3 /var/www/zootovary/data/www/zootovary.com/blog/index.php(42): require('/var/www/zootov...') #4 {main} thrown in /var/www/zootovary/data/www/zootovary.com/includes/functions/articles.php on line 369