Uncaught Error: Call to a member function save() on bool

PHP Fatal error: Uncaught Error: Call to a member function save() on bool in /home/wp_site_1627320122/wp-content/plugins/wpc-force-sells/wpc-force-sells.php:792

function new_order_item( $item_id, $item, $order_id ) {
					$order = wc_get_order( $order_id );

					$quantity = $item->get_quantity();

					if ( ( 'line_item' === $item->get_type() ) && ! wc_get_order_item_meta( $item_id, '_woofs_ids', true ) && ! wc_get_order_item_meta( $item_id, '_woofs_parent_id', true ) ) {
						$product    = $item->get_product();
						$product_id = $product->get_id();

						if ( $product && ( $woofs_ids = get_post_meta( $product_id, 'woofs_ids', true ) ) ) {
							if ( $woofs_items = self::get_items( $woofs_ids, $product_id ) ) {
								foreach ( $woofs_items as $woofs_item ) {
									$woofs_item_id      = $woofs_item['id'];
									$woofs_item_price   = $woofs_item['price'];
									$woofs_item_qty     = $woofs_item['qty'];
									$woofs_item_product = wc_get_product( $woofs_item_id );

									if ( ! $woofs_item_product ) {
										continue;
									}

									if ( get_post_meta( $product_id, 'woofs_separately', true ) !== 'on' ) {
										$woofs_product_price  = $woofs_item_product->get_price();
										$woofs_item_new_price = self::new_price( $woofs_product_price, $woofs_item_price );
										$woofs_item_product->set_price( $woofs_item_new_price );
									}

									// add force sells products
									$woofs_order_item_id = $order->add_product( $woofs_item_product, $woofs_item_qty * $quantity );

									if ( ! $woofs_order_item_id ) {
										continue;
									}

									$woofs_order_items = $order->get_items( 'line_item' );
									$woofs_order_item  = $woofs_order_items[ $woofs_order_item_id ];

									if ( get_post_meta( $product_id, 'woofs_separately', true ) !== 'on' ) {
										$woofs_order_item->add_meta_data( '_woofs_parent_id', $product_id, true );
									}

									$woofs_order_item->save();
								}
							}
						}

						$order->save();
					}
				}

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