[keycloak-user] CUstom authentication flow

Dear experts, I'm working with version 1.9.4 of the product, I'm developing a couple of custom forms that should be integrated into an authentication workflow. Following the example integrated into the product: 1) I compiled the "org.keycloak.examples.authenticator" 2) I copied the "secret'question.ftl" and "secret'question'config.ftl" files into the keycloak/themes/keycloak/login and keycloak/themes/base/login 3) I moved the generated jar file "authenticator-required-action-example.jar" into keycloak/providers 4) I opened the admin console, I create a new flow consisting of "Username and passowrd" and "Secret-question". I try to login with a user and the error message that I get is: 15:36:26,319 ERROR [org.keycloak.forms.login.freemarker.FreeMarkerLoginFormsProvider] (default task-15) Failed to process template: org.keycloak.theme.FreeMarkerException: Failed to process template secret-question-config.ftl That is compatible with what I found here: https://issues.jboss.org/browse/KEYCLOAK-2534 But I copied the files in the correct position: what else could cause such error? Thanks