TypeError: Cannot convert undefined or null to object

[mayconmesquita]

I have this issue running the most basic documentation demo (Cache a route):

const express = require('express');
const apicache = require('apicache');

let app = express();
let cache = apicache.middleware;

app.get('/api/collection/:id?', cache('5 minutes'), (req, res) => {
  res.json({ foo: 'bar' })
})

Node v11.10.1, Express v4.14.0, apicache v1.5.3

[SethKitchen]

I've narrowed it down:

When I add this prototype it is causing it to fail:

Array.prototype.removeAt = function (iIndex){
   var vItem = this[iIndex];
   if (vItem) {
       this.splice(iIndex, 1);
   }
   return vItem;
};

When I remove it, program runs normally.

Strange when I change it from "removeAt" to "myRemoveAt" it is still broken, so it's not just the name that matters