Fatal error: Uncaught Error: Undefined class constant 'PRIMARY_IMAGE_HASH' in /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/helpers/schema/replace-vars-helper.php:81 Stack trace: #0 /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/generators/schema-generator.php(54): Yoast\WP\SEO\Helpers\Schema\Replace_Vars_Helper->register_replace_vars(Object(Yoast\WP\SEO\Context\Meta_Tags_Context)) #1 /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/presentations/indexable-presentation.php(654): Yoast\WP\SEO\Generators\Schema_Generator->generate(Object(Yoast\WP\SEO\Context\Meta_Tags_Context)) #2 /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/presentations/abstract-presentation.php(64): Yoast\WP\SEO\Presentations\Indexable_Presentation->generate_schema() #3 /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/presenters/schema-presenter.php(53): Yoast\WP\SEO\Presen in /home/customer/www/unclewiener.com/public_html/wp-content/plugins/wordpress-seo/src/helpers/schema/replace-vars-helper.php on line 81