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Fatal error: Uncaught TypeError: format_citations(): Argument #1 ($body) must be of type string, null given, called in /var/www/html/abp/www/article.php on line 38 and defined in /var/www/html/abp/www/article.php:19 Stack trace: #0 /var/www/html/abp/www/article.php(38): format_citations() #1 {main} thrown in /var/www/html/abp/www/article.php on line 19