I upgraded from 1.102 to 1.116 and tried to modify the "Manage Hudson" screen. I
do not have any slaves configured. The following exception came
when I tried to save a change to the system message. The Master/Slave Support ->
Slaves "Add" button doesn't appear to do anything either.

Please let me know if any other information would be useful.

java.lang.IllegalArgumentException: hudson.model.Descriptor$FormException:
Invalid slave configuration. PluginName is empty
at org.kohsuke.stapler.RequestImpl.bindParameters(RequestImpl.java:278)
at hudson.model.Hudson.doConfigSubmit(Hudson.java:1062)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:95)
at org.kohsuke.stapler.Function.bindAndinvoke(Function.java:51)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:63)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:272)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:209)
at org.kohsuke.stapler.Stapler.service(Stapler.java:72)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)
at winstone.ServletConfiguration.execute(ServletConfiguration.java:249)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:335)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:378)
at hudson.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:79)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:195)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:368)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)
at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)
at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
at java.lang.Thread.run(Thread.java:595)
Caused by: hudson.model.Descriptor$FormException: Invalid slave configuration.
PluginName is empty
at hudson.model.Slave.(Slave.java:111)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at org.kohsuke.stapler.RequestImpl.bindParameters(RequestImpl.java:263)
... 23 more