https：// localhost返回ERR_SSL_PROTOCOL_ERROR（安全连接）

Question

我正在使用Node和express.js来构建我的服务器，我设置了我的https服务器（基本上）就像这样：

const privateKey  = fs.readFileSync('./credentials/rippal.key', 'utf8');
const certificate = fs.readFileSync('./credentials/rippal.crt', 'utf8');
const credentials = {key: privateKey, cert: certificate};

const app = express();
setup(app, config);

let httpsServer = https.createServer(credentials, app)

httpsServer.listen(3333, function () { 
    console.log("Server listening on port 3333...\n");
});

使用自签名证书，它仍适用于http://localhost:3333，但当我尝试访问https://localhost:3333时，Chrome告诉我

This site can’t provide a secure connection
localhost sent an invalid response.
ERR_SSL_PROTOCOL_ERROR

我应该如何访问https://localhost:3333？

谢谢！