Fatal error: Uncaught Error: Call to undefined function wp_is_block_theme() in /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-content/plugins/schema-and-structured-data-for-wp/admin_section/common-function.php:5466 Stack trace: #0 /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-content/plugins/schema-and-structured-data-for-wp/modules/reviews/class-saswp-review-feature-frontend.php(54): saswp_is_block_theme() #1 /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-content/plugins/schema-and-structured-data-for-wp/modules/reviews/class-saswp-review-feature-frontend.php(1756): SASWP_Review_Feature_Frontend->__construct() #2 /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-content/plugins/schema-and-structured-data-for-wp/structured-data-for-wp.php(109): require_once('/homepages/16/d...') #3 /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-settings.php(409): include_once('/homepages/16/d...') #4 /h in /homepages/16/d580800871/htdocs/clickandbuilds/Immobilienpreisberechnen/wp-content/plugins/schema-and-structured-data-for-wp/admin_section/common-function.php on line 5466