Multiple asynchronous calls breaks

[nesticle8bit]

I created an algorithm to map all the files and folders from my ftp but i get an error when the folder is too big and breaks with this error:

[grunt-develop] > \app\controllers\mapper.controller.js:27
                Promise.all(list.map(async (file) => {
                                 ^

TypeError: Cannot read property 'map' of undefined

My code is this:

let ftpPathMapper = async (folder) => {
    let listaArchivosCarpetas = await returnPathDocumentList(folder).then(list => list);

    let json = JSON.stringify(listaArchivosCarpetas);
    fs.writeFileSync(`./mapper/${folder.replace('/docs/', '')}.json`, json);
};

let returnPathDocumentList = async (path) => {
    return await new Promise((resolve, reject) => {
        let ftpClient = new ftp();

        ftpClient.on('ready', function () {
            ftpClient.list(path, function (err, list) {
                if (err)
                    reject(err);

                Promise.all(list.map(async (file) => {
                    let folderPath = `${path}/${file.name}/`.replace('//', '/');

                    let currentRes = {
                        name: file.name,
                        type: file.type,
                        path: folderPath,
                        Subcarpeta: []
                    };

                    if (currentRes.type === 'd')
                        currentRes.Subcarpeta = await returnPathDocumentList(folderPath);

                    console.log(folderPath);

                    return currentRes;
                })).then(s => {
                    // ftpClient.destroy();
                    resolve(s);
                    ftpClient.end();
                    ftpClient.destroy();
                });
            });
        }).connect({
            host: "url",
            port: 21,
            user: "user",
            password: "pass",
        });
    })
};

But i dont really know why with bigger folders crash

[nesticle8bit]

The problem that I found with this library is that it does not recognize accents in Spanish (á, é, í, ó, ú), so when I'm going through all the FTP when it finds a folder with that accent immediately crashes, there is some way that the bookstore accept special characters? or Unicode?

Thank you