Spring Boot + React + Keycloak after login returns No Access-Controll-Allow-Origin header is present

Configuring the server
1

I am trying to add a frontend to my SpringBoot application. I also have a users provider connected perfectly, because if I did a CURL it works.

The problem begins when connecting react to Keycloak to do a login, it shows the login page, but when the login is OK it returns
Access to XMLHttpRequest at 'http://localhost:18080/auth/realms/Realm/protocol/openid-connect/token' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

It still problem of Keycloak because it is working by CURL, but I could not reach to configure it well.

I add a * in Web Origins of the Client also.

2

Have the same problem with js frontends. So seems like the issue is in keycloak itself, not in client adapters.
Configuring Web Origins also didn’t help in my case

3

Take a look here: CORS settings don't work

4

Any solution? I have the same issue with my react app. Im using react and springboot gateway