Fatal error: Uncaught Error: Call to undefined function wp_is_rest_endpoint() in /nowe_strony/flugo/wp-includes/script-loader.php:2590 Stack trace: #0 /nowe_strony/flugo/wp-includes/blocks/index.php(29): wp_should_load_separate_core_block_assets() #1 /nowe_strony/flugo/wp-includes/class-wp-hook.php(324): register_core_block_style_handles('') #2 /nowe_strony/flugo/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /nowe_strony/flugo/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /nowe_strony/flugo/wp-settings.php(643): do_action('init') #5 /nowe_strony/flugo/wp-config.php(186): require_once('/nowe_strony/fl...') #6 /nowe_strony/flugo/wp-load.php(50): require_once('/nowe_strony/fl...') #7 /nowe_strony/flugo/wp-blog-header.php(13): require_once('/nowe_strony/fl...') #8 /nowe_strony/flugo/index.php(17): require('/nowe_strony/fl...') #9 {main} thrown in /nowe_strony/flugo/wp-includes/script-loader.php on line 2590