Express js fails React build?

Question

Node.js

Build React project (create-react-app) via yarn build. The assembly can be started via serve -s build (works correctly)

On the express server, I registered

app.use(express.static(path.join(__dirname + "../../client/build")));
            
            app.get("*", (req, res) => {
                res.sendFile(path.resolve(__dirname, "..", "..", "client", "build", "index.html"));
            });

When starting the server and entering the browser, the server gives this file, but in the id=root element, where the content should be added by means of react, it is empty.
Moreover, if you manually write something into the index.html file, it will be displayed.

Error in console

Answer 1

It helped, replaced the above code with this

const root = require('path').join(__dirname, '..', '..', 'client', 'build')
            app.use(express.static(root));
            app.get("*", (req, res) => {
                res.sendFile('index.html', { root });
            })