Access Token error on Nest

I'm building up a website to control Nest devices and I've been working perfectly getting "Access tokens", but since the a few days ago I've been experiencing a problem when trying to get the "Access token" and no matter what I do and how long I wait I'm always getting "An error occured while fetching client info".

I've tried making new accounts, new clients, using proxies, everything, and nothing seems to solve the problem.

Is anyone experiencing this too? Anyone knows what's going on in here?

This is what the website throws me.

Can't get access token

Thanks in advance!

Solution

It should've been pointing to: home.nest.com/login/oauth2?client_id=XXXXX&state=STATE instead of home.testc.nestlabs.com/login/oauth2?client_id=XXXXX&state=STATE. The Nest's developer site is outdated and displays an old URL.