Fatal error: Uncaught Error: Call to undefined function wp_theme_has_theme_json() in /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-content/plugins/use-any-font/includes/functions/uaf_block_editor_functions.php:60 Stack trace: #0 /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-content/plugins/use-any-font/includes/functions/uaf_block_editor_functions.php(49): uaf_update_theme_json_font(Array) #1 /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-content/plugins/use-any-font/includes/functions/uaf_font_functions.php(229): uaf_block_editor_custom_fonts() #2 /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-content/plugins/use-any-font/includes/functions/uaf_admin_functions.php(137): uaf_write_css() #3 /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-includes/class-wp-hook.php(307): uaf_plugin_initialize('') #4 /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #5 /var/www/u1059118/data/www/xn--80aabfhbu8c in /var/www/u1059118/data/www/xn--80aabfhbu8cbtd.xn--p1ai/wp-content/plugins/use-any-font/includes/functions/uaf_block_editor_functions.php on line 60