[keycloak-user] example: authenticator-required-action-example

Hi, I read the documentation of the Authentication SPI and I tried to get the example running like it is described in the README.md file but I got the following error when I deploy it to my local keycloak server: ----------------------------------- [ERROR] Failed to execute goal org.wildfly.plugins:wildfly-maven-plugin:1.1.0.Beta1:deploy (default-cli) on project authenticator-required-action-example: Failed to execute goal deploy: {"WFLYC TL0062: Composite operation failed and was rolled back. Steps that failed:" => {"Operation step-1" => {"WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"authenticator-required-action- example.jar\".POST_MODULE" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"authenticator-required-action-example.jar\".POST_MODULE: WFLYSRV0153: Failed to process ph ase POST_MODULE of deployment \"authenticator-required-action-example.jar\" [ERROR] Caused by: java.lang.NoClassDefFoundError: Failed to link org/keycloak/examples/authenticator/SecretQuestionRequiredActionFactory (Module \"deployment.authenticator-required-action-exam ple.jar:main\" from Service Module Loader): org/keycloak/authentication/RequiredActionFactory"}}}} ----------------------------------- What I did: Download and unzip the current version of keycloak 2.5.0.Final and start the server checkout the master branch of the keycloak repo, navigate to the corresponding sub directory of the example execute mvn clean install wildfly:deploy like it is described in the README.md of the artifact I also tried to get it running with the git revision that is tagged with "2.5.0.Final", but with the same error. Do I miss something? Any help is welcome! Kind Regards and thanks in advance Christian