Fatal error: Uncaught Error: Call to undefined function wp_is_rest_endpoint() in /home/sites/9b/7/7f55ee9143/staging/wp-includes/script-loader.php:2590 Stack trace: #0 /home/sites/9b/7/7f55ee9143/staging/wp-includes/blocks/index.php(29): wp_should_load_separate_core_block_assets() #1 /home/sites/9b/7/7f55ee9143/staging/wp-includes/class-wp-hook.php(324): register_core_block_style_handles('') #2 /home/sites/9b/7/7f55ee9143/staging/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /home/sites/9b/7/7f55ee9143/staging/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /home/sites/9b/7/7f55ee9143/staging/wp-settings.php(643): do_action('init') #5 /home/sites/9b/7/7f55ee9143/staging/wp-config.php(88): require_once('/home/sites/9b/...') #6 /home/sites/9b/7/7f55ee9143/staging/wp-load.php(50): require_once('/home/sites/9b/...') #7 /home/sites/9b/7/7f55ee9143/staging/wp-blog-header.php(13): require_once('/home/sites/9b/...') #8 /home/sites/9b/7/7f55ee9143/staging/index.php(17): require('/home/sites/9 in /home/sites/9b/7/7f55ee9143/staging/wp-includes/script-loader.php on line 2590