node.js TypeError: path must be absolute or specify root to res.sendFile [failed to parse JSON]

Question

[add] So my next problem is that when i try adding a new dependence (npm install --save socket.io). The JSON file is also valid. I get this error: Failed to parse json

Answer 1

I used the code below and tried to show the sitemap.xml file

router.get('/sitemap.xml', function (req, res) {
    res.sendFile('sitemap.xml', { root: '.' });
});