Using Spring Security 5 oauth I successfully ran through the whole authentication/authorization cycle using Google as OAuth provider, but I am stuck if I use an OAuth provid
These error means , that authorization request doesn't found. authorization request is stored in session, so some how session is not getting stored. by default session is managed by cookie.
So I think that might be because you are running everything on localhost, so first cookie is set by localhost:8080 to store the authorization request session data, & when you login to localhost:8081 it'll set another cookie for it's session.