Could not obtain configuration from server

Hi, I’m working and learning how to use keycloak for my new app.
But I encounter a problem that I cannot solve despite numerous researches.
So, I want to use docker with Postgresql. So it’s good my postgresql and my keycloak are working and
It both connects properly. But when I run my backend I got this error :

Could not obtain configuration from server “http://localhost:9080/auth/realms/CodeReviewers/.well-known/uma2-configuration”.

Show my keycloack config :

{
“realm”: “CodeReviewers”,
“auth-server-url”: “http://localhost:9080/auth”,
“ssl-required”: “external”,
“resource”: “back-end”,
“public-client”: true,
“credentials”: {
“secret”: “4c3baaab-dce5-4ec4-b680-a680b4a37d68”
}
}

If anyone would have a solution.
Wishing you a good day !