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I have seen this error before, but without your code I can't be certain, that it's the issue.

Anywhere in your code do you have a line like this: app.use(); without parameters? If so, app.use() actually requires multiple parameters and a callback, it should be formatted as so:

// This is what it should look like
app.use(function (req, res, next) {
  console.log('Time: %d', Date.now());
  next();
//Note you don't have to use 'next'
app.use(function (req, res) {
  console.log('Time: %d', Date.now());

also note that you don't need to explicitly use req or res but you need to add them as parameters.