TypeError: Cannot read property 'write' of null

[2M4U]

(node:14840) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'write' of null
    at IPCTransport.send (C:\Users\CG\Desktop\Github\Buttons\node_modules\discord-rpc\src\transports\ipc.js:155:17)
    at C:\Users\CG\Desktop\Github\Buttons\node_modules\discord-rpc\src\client.js:166:22
    at new Promise (<anonymous>)
    at RPCClient.request (C:\Users\CG\Desktop\Github\Buttons\node_modules\discord-rpc\src\client.js:164:12)
    at buttons (C:\Users\CG\Desktop\Github\Buttons\lib\functions\buttons.js:5:12)
    at loopStatus (C:\Users\CG\Desktop\Github\Buttons\lib\functions\requests.js:13:9)
    at Object.<anonymous> (C:\Users\CG\Desktop\Github\Buttons\status.js:16:1)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:14840) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:14840) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

CODE

  client.request('SET_ACTIVITY', {
        pid: process.pid,
        activity: {
            assets: {
                large_image: config.assets.image_key,
                large_text: config.assets.image_text,
            },
            buttons: [
                { label: config.button_one.label_name, url: config.button_one.label_url },
                { label: config.button_two.label_name, url: config.button_two.label_url },
            ],
            instance: config.instance || true
        },
    });

    client.on('ready', async () => {
        console.log(`${client.user.username}#${client.user.discriminator}'s presence has updated.`)
    });

    client.login({ clientId: config.client_id }).catch(console.error);```