redirect_url is whitelisted, but I still get the error.

[dvgabriel]

Hello, 

I am currently getting this error:

The weird thing is that I had everything working a couple days ago. And this just does not work when I am trying to connect locally. I am using localtunnel to get the https url.

I find it very weird that something that was working a couple days ago is not working anymore. I have everything exactly the same, except that I substituted the current tunneling url.