Invalid array buffer length

Hi all,

I'm trying to start some tests with this code and i'm getting the error below every time that i try to start a test:

RangeError: Invalid array buffer length
at new ArrayBuffer (native)
at new Uint8Array (native)
at createBuffer (buffer.js:23:15)
at allocate (buffer.js:98:12)
at new Buffer (buffer.js:53:12)
at DownloadController.getDownload (/root/Speed-testJS/controllers/DownloadController.js:56:30)
at Layer.handle [as handle_request] (/root/Speed-testJS/node_modules/express/lib/router/layer.js:95:5)
at next (/root/Speed-testJS/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/root/Speed-testJS/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/root/Speed-testJS/node_modules/express/lib/router/layer.js:95:5)

I'm testing a Gigabit Network. Below are some specs and environment of the server:

Distro: Ubuntu 16.04.2 LTS
NodeJS: v4.2.6
NPM: 3.5.2
Memory:
total used free shared buff/cache available
1999 222 1676 5 101 1639

If anyone knows what's going on and may help me i'll be really glad full.