jBPM Login Failed: Not Authorized: All of the pre-defined users dont work

Question

I am trying to use the Business-Central/Workbench module. Followed the instructions as provided in the [Getting Started][1] of jBPM. I tried with all the pre-defined logins. Nothing works. It throws

I also tried to look into the application-roles.properties and application-users.properties files. Both seems to be empty (only comments).

The error is something like:

ERROR [io.undertow.request] (default task-5) UT005023: Exception handling request to /business-central/rest/controller/server/sample-server: java.lang.NoClassDefFoundError: java/security/acl/Group
...
...
...
 Caused by: java.lang.ClassNotFoundException: java.security.acl.Group from [Module "org.picketbox" from local module loader @2c07545f (finder: local module finder @e57b96d (roots: /Users/abcd/EclipseProjects/Drools_Workbench/jbpm-server-7.43.1.Final-dist/modules,/Users/abcd/EclipseProjects/Drools_Workbench/jbpm-server-7.43.1.Final-dist/modules/system/layers/base))]

Answer 1

Finally figured out the issue. It is:

java.lang.NoClassDefFoundError: java/security/acl/Group

This pointed to an incompatible JDK. I downgraded from JDK14 to JDK11.