Connection refused when accessing discovery url

[jamieyapyq]

I am running revomatico/docker-kong-oidc:3.2.2-3 with keycloak using docker-compose.

I am getting this error:
openidc.lua:573: openidc_discover(): accessing discovery url (http://keycloak:8080/auth/realms/master/.well-known/openid-configuration) failed: connection refused

Have tried to curl the discovery url from kong shell and managed to get the response from keycloak. Can I check why lua is still throwing this error?