Keycloak and Rocket Chat intergration

I am trying to integrate the Rocket chat with the keycloak.
My Rocket Chat is 0.63.3v . And my Keycloak is 4.0.0v.
My Keycloak configuration:

id : rocketchat
Client Protocol: Openind Connect
Access Type : Confidential
Valid Redirect URIs : http://IP_Address:port/_oauth/keycloak
Standard Flow Enabled:on
Implicit Flow Enabled:on
Direct Access Grants Enabled :on

Rocket Chat OAuth Configuration

URL: http://IP_Address"port/auth
Token Path : realms/sample/protocol/openid-connect/token
Identity Path: realms/sample/protocol/openid-connect/userinfo
Authorize Path: realms/sample/protocol/openid-connect/auth
Scope: openid
Token Sent Via: header
Id: rocketchat
Secret: keycloak secret id

Here sample is my realm name.

But after this configuration the rocket chat login page does not redirect to keycloak page.
And i am not seeing any login rocket chat and keycloak.

How to solve my problem.Any one know the solution, please tell me

Start by reviewing the Rocket Chat OAuth configuration and the Keycloak client settings shown in the issue, then reproduce the login attempt with the stated Rocket Chat and Keycloak versions. Done means the Rocket Chat login page redirects to Keycloak and a Keycloak-authenticated user can sign in; no repository file or test is identified.