Stuck getting Acces_token from Nest Server

After i finally got the nest-api working on my node.js app i started to have a problem while trying to get access tokens, it doesn't matter if i connect from different clients, devices or even accounts. I used to have a php code that automated the oAuth 2.0 process of getting the token and was working fine but since it stopped working it doesn't matter if i put the "OAuth Redirect Url" to get the token automatically or simply try to get it without the url. Every time i try i got stuck with the message

An error occured. An error occured while fetching client info

and thats all, no logs entries or anything just that non-descriptive message.

For Example if i create a new account and then i add a client to this account i get an url where i can retrieve an access token for the user account that want to control its nest products from my client, the url looks like this:

https://home.testc.nestlabs.com/login/oauth2?client_id=XXXXX&state=STATE

when you enter this url it should ask for your nest credentials and then generate an access token, this was working fine doing the exact same steps, but now it doesn't even ask for the credentials, all i get is that message and nothing else.