getting error on attaching attachments

export const cdnUpload: RequestHandler = async (req, res) => {
    if (!req.files || (req.files as Express.Multer.File[]).length < 1) return res.status(500).json({ message: "No image set" });
    try {
        // Extract product data from the request
        const { produk, price, stock, description } = req.body;
        console.log(produk);
        console.log(price);
        console.log(stock);
        const images = (req.files as Express.Multer.File[]).map((file) => new AttachmentBuilder(file.buffer).setFile(file.buffer).setName(file.filename)); // Convert uploaded files to MessageAttachment instances
        const id = await generateUniqueID();

        // Get the target guild
        console.log(client)
        const guild = await client.guilds.fetch(process.env.GUILD!);

        // Create a new channel in the target guild
        const channel = await guild.channels.create({
            name: `product-${produk}-${id}`,
            reason: 'New product upload',
        });

        // Send the images and product details to the new channel
        const productMessage = await channel.send({
            content: `**Product Name:** ${produk}\n**Price:** ${price}\n**Stock:** ${stock}\n**Description:** ${description}`,
            files: images,
        });

        // Create a new product document
        const newProduct = new ProductModel({
            id,
            nama: produk,
            price,
            stok: stock,
            description,
            img: productMessage.attachments.map((attachment:Attachment) => attachment.url),
        });

        // Save the product to the database
        await newProduct.save();

        // Respond with success
        res.status(200).json({ message: 'Product uploaded successfully!' });
    } catch (error) {
        console.error('Error uploading product:', error);
        res.status(500).json({ message: 'Error uploading product.' });
    }
};

export const cdnUpload: RequestHandler = async (req, res) => {
    if (!req.files || (req.files as Express.Multer.File[]).length < 1) return res.status(500).json({ message: "No image set" });
    try {
        // Extract product data from the request
        const { produk, price, stock, description } = req.body;
        console.log(produk);
        console.log(price);
        console.log(stock);
        const images = (req.files as Express.Multer.File[]).map((file) => new AttachmentBuilder(file.buffer).setFile(file.buffer).setName(file.filename)); // Convert uploaded files to MessageAttachment instances
        const id = await generateUniqueID();

        // Get the target guild
        console.log(client)
        const guild = await client.guilds.fetch(process.env.GUILD!);

        // Create a new channel in the target guild
        const channel = await guild.channels.create({
            name: `product-${produk}-${id}`,
            reason: 'New product upload',
        });

        // Send the images and product details to the new channel
        const productMessage = await channel.send({
            content: `**Product Name:** ${produk}\n**Price:** ${price}\n**Stock:** ${stock}\n**Description:** ${description}`,
            files: images,
        });

        // Create a new product document
        const newProduct = new ProductModel({
            id,
            nama: produk,
            price,
            stok: stock,
            description,
            img: productMessage.attachments.map((attachment:Attachment) => attachment.url),
        });

        // Save the product to the database
        await newProduct.save();

        // Respond with success
        res.status(200).json({ message: 'Product uploaded successfully!' });
    } catch (error) {
        console.error('Error uploading product:', error);
        res.status(500).json({ message: 'Error uploading product.' });
    }
};