Broken link in license-warning dialog ("remove the 'Use Confluence' permission")

https://support.atlassian.com/browse/CSP-3868

I've evaluated Confluence for a month. Now I decided to get non-profit license limited to 2 user. Actualy I have 4 users registered however only 2 of them are real active users.
I've entered the license and saved it.
I've got text-box stating " 2 (4 signed up currently)
You have more registered users than your license allows, either:
Contact sales@atlassian.com to purchase a larger license, or
remove the "Use Confluence" permission from some groups." where "remove the "Use Confluence" permission " is a link.
Every time I click this link I get one and the same error message:

System Error
Cause:
com.opensymphony.xwork.config.ConfigurationException: There is no Action mapped for namespace /admin/users and action name globalpermissions-start
at com.opensymphony.xwork.DefaultActionProxy.(DefaultActionProxy.java:72)

Stack Trace: [hide]

com.opensymphony.xwork.config.ConfigurationException: There is no Action mapped for namespace /admin/users and action name globalpermissions-start
at com.opensymphony.xwork.DefaultActionProxy.(DefaultActionProxy.java:72)
at com.opensymphony.xwork.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:45)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:227)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:199)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
at com.atlassian.confluence.util.profiling.ProfilingPageFilter.parsePage(ProfilingPageFilter.java:150)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at com.atlassian.confluence.util.ServletContextThreadLocalFilter.doFilter(ServletContextThreadLocalFilter.java:30)