RH-SSO shows "Invalid parameter: redirect_uri", despite the Redirect URI has been already configured for the corresponding client

Issue

• RH-SSO shows Invalid parameter: redirect_uri, despite the Redirect URI has been already configured for the corresponding client.

• Generally the scenario is, when the Valid Redirect URIs in RH-SSO is setting a UPPERCASE hostname, the RH-SSO will throw the issue. The workaround is set the lowercase in hostname.

TRACE [org.keycloak.events] (default task-952) type=LOGIN_ERROR, realmId=xxxx, clientId=xxxx, userId=null, ipAddress=xx.xx.xx.xx, error=invalid_redirect_uri, redirect_uri=http://XXXX.xxx.com:8101, requestUri=https://xxx.xxx.com/auth/realms/xxxx/protocol/openid-connect/auth?client_id=pos-ubrtool-prod&redirect_uri=http://XXXX.xxx.com:8101&response_type=code&scope=openid, cookies=[AUTH_SESSION_ID_LEGACY=09139014-8b15-4165-b689-692b134e1548.xxxxxxx00183,