When adding some fields to the page (from the client side), an error occurs: Cannot read properties of undefined (reading 'split'). Occurs in this code snippet const jwt = require('jsonwebtoken');

module.exports = function(role) {
    return function (req, res, next) {
        if (req.method === "OPTIONS") {
            next();
        }
        try {
            const token = req.headers.authorization.split(' ')[1];
            if (!token) {
                return res.status(401).json({message: "Not authorized"});
            }
            const decoded = jwt.verify(token, process.env.SECRET_KEY);
            if (decoded.role !== role) {
                return res.status(403).json({message: "No access"});
            }
            req.user = decoded;
            next();
        } catch (e) {
            console.log(e.message); //error message here
            res.status(401).json({message: "Not authorized"});
        }
    };
}

Moreover, if you add it from the server side (for example, in postman), then everything works well. Where is the mistake?