Promise was rejected with a non-error

[nmoinvaz]

It seems that the promise is not rejected with an error and it generates this warning:

Consider using something like:

request.onerror = function() {
    reject(new Error('Request for ' + url + ' failed with status code ' + request.status));
};

This occurs when using Bluebird Promises.

[Vansh-Baghel]

@developit can u assign this issue to me? I would be able to fix it after few questions.