CAS Inbound Authenticator Error 500 - Internal Server Error v5.7.0

[malnajdi]

Hello,

Following the docs on how to setup CAS I got it to work but from time to time i get a 500 error.
I used every step in the docs here https://docs.wso2.com/display/ISCONNECTORS/Configuring+CAS+Inbound+Authenticator

Url: https://localhost:9443/identity?sessionDataKey=b1e4ae4c-dc89-4506-8deb-f0ef7fcbc52a
environment: Windows 10 64
java: jdk1.8.0_144\jre
wso2is version: v5.7.0
cas version: cas-2.0.1.jar

Error Trace:

Servlet.service() for servlet [bridgeservlet] in context with path [/] threw exception
org.wso2.carbon.identity.base.IdentityRuntimeException: Base URL is blank: null

[2018-10-24 17:22:13,522] ERROR {org.apache.catalina.core.StandardWrapperValve} - Servlet.service() for servlet [bridgeservlet] in context with path [/] threw exception
org.wso2.carbon.identity.application.authentication.framework.inbound.FrameworkRuntimeException: org.wso2.carbon.identity.application.authentication.framework.inbound.FrameworkRuntimeException: No IdentityProcessor found to process the request