@Override
    public Event handle(final Exception exception, final RequestContext requestContext) {
        LOGGER.trace("Unable to translate errors of the authentication exception [{}]. Returning [{}]",
            exception, CasWebflowExceptionCatalog.UNKNOWN);
        addErrorMessageToContext(exception, requestContext);
        return EVENT_FACTORY.event(this, CasWebflowExceptionCatalog.UNKNOWN);
    }
This is {@link GenericCasWebflowExceptionHandler}.

@author Misagh Moayyed
@since 6.1.0
core/cas-server-core-webflow-api/src/main/java/org/apereo/cas/web/flow/authentication/GenericCasWebflowExceptionHandler.java