cas-server-webapp | CAS Server | Authentication library

I am performing the next steps:

1. I access to a restricted URL (/myapp/login) of my java application
2. I am redirected to /cas/login page
3. I introduce the correct credentials
4. CAS redirect the request to the restricted URL (i.e.:/myapp/login)
5. My application instead of accepting the request, detect this URL as protected again and redirect again the request to CAS: /cas/login
6. The auth-cookies are in the browser so the authentication is OK
7. Step 4
8. Step 5
9. Step 6 etc

My CAS Server versions:

• CAS Version: 6.1.0-RC3-SNAPSHOT
• Spring Boot Version: 2.2.0.M1
• Spring Version: 5.1.5.RELEASE
• Java Home: C:\Program Files\Java\jdk-11.0.2

cas.properties:

I need to configure my CAS server (v5.3.6) to use database authentication using encode method. Unfortunately, the CAS default hash service (Apache Shiro's) deos not meet my needs and so I have to customize the password encoder.
The answer here seems to fit my case pretty well. As suggested I put the files QueryAndEncodeDatabaseAuthenticationHandler.java and AbstractJdbcUsernamePasswordAuthenticationHandler.java in my maven overlay under the path src/main/java/org/apereo/cas/adaptors/jdbc and I try to compile it (mvn clean package). The idea is to customize the function digestEncodedPassword in the class QueryAndEncodeDatabaseAuthenticationHandler according to my needs. But before to try that I just tried to compile the two unmodified java CAS files. In doing that I got several compilation errors:

I'm trying to build project with following dependency

I'm trying to setup CAS with delegated authentication with ADFS. I checked the documentation for delegation and for adding ADFS integration. When I try to run the CAS server, I get the exception below. Can someone help me understand what is going wrong?

I try to configure the Apereo CAS 5.0.6 REST API and I have and when I send a POST request to get a TGT, I got this error :

I'm using CAS 5.2.0-RC3 to authenticate users (using a REST authentication provider). Right now, I've switched to mock rest services to debug.

On returning a 428 HTTP Code (force a password change), I get a Webflow error. I want to allow the password change to also be managed by a REST endpoint.

Do I need to add an action-state for handleauthenticationfailure with a bunch of transitions in my login-webflow.xml? Shouldn't CAS be doing this for me?

Exception (without any login-webflow.xml overlay):

I've been trying to change to a CAS 5.1.x Server from a 4.X Server for the past 3 days with various searches and research and next to no progress. Whenever I remove the dependency to cas-server-webapp-tomcat, the artifact deploys on the local tomcat apache server however it does not show anything except the standard Apache 404 error page. Here is the log for that case: