Error: write after end in request npm library

I am trying to send a file via the request npm library, but I keep getting the write after end error. What's wrong? How can I fix this?

This is the way I'm doing this:

    return new Promise((resolve, reject) => {
        const callback = (error, response, body) => {
            if (!error && response.statusCode < 400) {
                resolve(body);
            }
            else {
                reject(error); // Write after end
            }
        };
        request({
            url: "https://api.url.com/v2/",
            method: "POST",
            formData: fs.createReadStream("file"),
        }, callback);
    });

via user99999