After logging in with my credentials from Config.groovy the SplitTestAuthController tries to redirect the application to SplitTestController with the (default) action 'index', but there is none - should be 'list'
change line 22 in SplitTestAuthController
redirect(controller: 'splitTest', action: 'list')
BTW: documentation regarding default passwords is wrong - doesn't work with 'admin' / 'changeit'