pochiko - Hello! does anyone kno whow to fix this ...

Function.prototype.apply was called on undefined, which is a undefined and not a function

my code is here:

const fs = require('fs');

module.exports = (client) => {
    client.handleEvents = async () => {
        const eventFolders = fs.readdirSync(`./src/events`);
        for (const folder of eventFolders) {
            const eventFiles = fs
            .readdirSync(`./src/events/${folder}`)
            .filter((file) => file.endsWith(".js"));
        switch (folder) {
            case "client":
                for (const file of eventFiles) {
                    const event = require(`../../events/${folder}/${file}`);
                    if (event.once) client.once(event.name, (...args) => event.execute(...args, client));
                    else client.on(event.name, (...args) => event.execute(...args, client));
                }
                break;
        
            default:
                break;
          }
        }
    }

}