Fatal error: Uncaught Error: Call to undefined function wp_theme_has_theme_json() in /var/www/bay.se/per.bay.se/wp-includes/theme-templates.php:212 Stack trace: #0 /var/www/bay.se/per.bay.se/wp-includes/class-wp-hook.php(308): wp_enable_block_templates('') #1 /var/www/bay.se/per.bay.se/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #2 /var/www/bay.se/per.bay.se/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /var/www/bay.se/per.bay.se/wp-settings.php(549): do_action('setup_theme') #4 /var/www/bay.se/per.bay.se/wp-config.php(31): require_once('/var/www/bay.se...') #5 /var/www/bay.se/per.bay.se/wp-load.php(50): require_once('/var/www/bay.se...') #6 /var/www/bay.se/per.bay.se/wp-blog-header.php(13): require_once('/var/www/bay.se...') #7 /var/www/bay.se/per.bay.se/index.php(17): require('/var/www/bay.se...') #8 {main} thrown in /var/www/bay.se/per.bay.se/wp-includes/theme-templates.php on line 212