throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) ^ TypeError: Router.use() requires a middleware function but got a string code example

Example 1: throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))

module.exports = router;

Example 2: TypeError: Router.use() requires a middleware function but got a Object

module.exports = router;