Error while sharing screen via Browser (Chrome and Firefox)

Question

I’m trying to make the Screen Sharing dialog appear in Chrome, but nothing happens.

I am using the following code (Just to display the dialog, I will stream to the server when it works)

    function screenshare() {
    navigator.mediaDevices.getUserMedia({
        video: {
            mandatory: {
                chromeMediaSource: 'screen',
                maxWidth: 1920,
                maxHeight: 1080,
                minAspectRatio: 1.77
            }
        },
        audio: false
    }, function(stream) {
        console.log(stream)
    }, function(error) {
        console.log(error)
    })
}

When I run the function I get the following error:

NavigatorUserMediaError {name: "InvalidStateError", message: "", constraintName: ""}constraintName: ""message: ""name: "InvalidStateError"__proto__: NavigatorUserMediaError

Yes, I’m already configured and installed in Chrome.

Anyone can help?

Thank you!