Keycloak spring invalid_token_response

Hi i am trying to secure a spring boot application with keycloak,
my configuration works on a blank springboot application,
however it doesn’t work with my spring boot application, the application is a service account.
Do you know where could be the problem?

WebSecurityConfig.kt
@Configuration
@EnableWebSecurity
class WebSecurityConfig : WebSecurityConfigurerAdapter() {

@Bean
fun passwordEncoder(): PasswordEncoder {
    return BCryptPasswordEncoder()
}

override fun configure(http: HttpSecurity) {


    http.authorizeRequests()
            .antMatchers("/api/public").permitAll()
            .antMatchers("/api/public").authenticated()
            .anyRequest().authenticated().and()
            .oauth2Login()
}

@Bean
fun clientRegistrationRepository(): ClientRegistrationRepository {
    return InMemoryClientRegistrationRepository(keycloakClientRegistration())
}

private fun keycloakClientRegistration(): ClientRegistration {
    return ClientRegistration.withRegistrationId("keycloak") // registration_id
            .clientId("insite-app")
            .clientSecret("98ee37d9-09f9-40f9-a965-947bc6ef0871")
            .scope("openid")
            .clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
            .authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE) // {baseUrl}/login/oauth2/code/{registration_id}
            .redirectUriTemplate("http://localhost:1337/login/oauth2/code/keycloak")
            .authorizationUri("http://localhost:8086/auth/realms/Portico/protocol/openid-connect/auth")
            .tokenUri("http://localhost:8086/auth/realms/Portico/protocol/openid-connect/token")
            .userInfoUri("http://localhost:8086/auth/realms/Portico/protocol/openid-connect/userinfo")
            .jwkSetUri("http://localhost:8086/auth/realms/Portico/protocol/openid-connect/certs")
            .userNameAttributeName(IdTokenClaimNames.SUB)
            .clientName("Insite")
            .build()
}

}

in keycloak configuration i set the valid redirect uri to : http://localhost:1337/login/oauth2/code/keycloak