{ status: 400, message: 'Invalid authorization code' } (OAuth authorization code flow)

[BarryCarlyon]

@Versifiction

I have the { status: 400, message: 'Invalid authorization code' } error in my backend

You tried to exchange the ?code for a token again

if you are doing the redirect I descirbed here

Using OAuth authorization code flow to get moderators of a channel

Sure, after getting the ?code and exchanging the code for an access token, store the access token in local storage then redirect to your home page/whever you want.

That may suggest your redirect is not removing the ?code and your code is trying to code exchange again.

Or you are storing the ?code in your session, instead of the resulting token, and trying to exchange the ?code again, rather than just using the access token generated from the code exchange flow