I'm trying to use the cas-plugin with the newest jenkins version 2.7

Unfortunately it doesn't appear to do anything. It doesn't redirect to the sso page. Even if i click on the Login-Button I can see the default login form of jenkins.

I cannot find anything related in the log files, except:

Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@799d55b3: defining beans [casServiceProperties,casSessionMappingStorage,casAuthenticationEntryPoint,casAuthenticationUserDetailsService,casEventListener,casAuthenticationManager,casFilter,casBeanFactory,casTicketValidator]; root of factory hierarchy

Did somebody tried to use the cas-plugin with the newest version? With our jenkins 1.655, everything seems to work fine.