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