Fatal error: Uncaught Error: Call to undefined function mb_strtoupper() in /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/generators/schema/article.php:225 Stack trace: #0 /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/generators/schema/article.php(59): Yoast\WP\SEO\Generators\Schema\Article->word_count('\xD0\xAF\xD0\xBA \xD0\xB7\xD0\xB0 \xD0\xBE\xD0\xB4\xD0...', '\xD0\xAF\xD0\xBA \xD0\xB7\xD0\xB0 \xD0\xBE\xD0\xB4\xD0...') #1 /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/generators/schema-generator.php(129): Yoast\WP\SEO\Generators\Schema\Article->generate() #2 /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/generators/schema-generator.php(76): Yoast\WP\SEO\Generators\Schema_Generator->generate_graph(Array, Object(Yoast\WP\SEO\Context\Meta_Tags_Context)) #3 /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/presentations/indexable-presentation.php(754): Yoast\WP\SEO\Generators\Schema_Generator->generate(Object(Yoast\WP\SEO\Context\Meta_Tags_Context)) #4 /var/www/mmi.dev/wp-content/plugins/wo in /var/www/mmi.dev/wp-content/plugins/wordpress-seo/src/generators/schema/article.php on line 225
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