im facing this error on my wordpress, im a totally beginner, Fatal error: Uncaught Error: Call to undefined function json_decode() in /home/livingth/public_html/wp-includes/functions.php:4629 Stack trace: #0 /home/livingth/public_html/wp-includes/blocks.php(372): wp_json_file_decode('/home/livingth/...') #1 /home/livingth/public_html/wp-includes/blocks.php(487): get_block_metadata_i18n_schema() #2 /home/livingth/public_html/wp-includes/blocks/legacy-widget.php(68): register_block_type_from_metadata('/home/livingth/...', Array) #3 /home/livingth/public_html/wp-includes/class-wp-hook.php(324): register_block_core_legacy_widget('') #4 /home/livingth/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL,…