function is not a function???

client.on(eventName, async (arg) => {
            for (const eventFile of eventFiles) {
                const eventFunction = require(eventFile);
                await eventFunction(client, arg);
            }
        })

client.on(eventName, async (arg) => {
            for (const eventFile of eventFiles) {
                const eventFunction = require(eventFile);
                await eventFunction(client, arg);
            }
        })