Vaadin 8.1.2 and Shiro Security

Hi everybody
the example:
https://github.com/vaadin-kim/shiro-example/tree/master/shiro-login-outside-vaadin-app
work just wenn i use Vaadin version 7.2.3 and earlier, but wenn i use Vaadin vesion 7.2.4 and later then don’t work
can anybody help me

thanks very much