cant start survey

[ctopolon4]

java.lang.NoClassDefFoundError: haven/Rendered
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getDeclaredMethod(Unknown Source)
at haven.Widget$FactMaker.make(Widget.java:150)
at haven.Widget$FactMaker.make(Widget.java:145)
at haven.Resource$CodeEntry.lambda$get$1(Resource.java:1372)
at java.security.AccessController.doPrivileged(Native Method)
at haven.Resource$CodeEntry.get(Resource.java:1362)
at haven.Resource.getcode(Resource.java:1207)
at haven.Widget.gettype2(Widget.java:196)
at haven.UI.newwidget(UI.java:230)
at haven.RemoteUI.run(RemoteUI.java:65)
at haven.MainFrame.uiloop(MainFrame.java:284)
at haven.MainFrame.run(MainFrame.java:300)
at haven.MainFrame.main2(MainFrame.java:446)
at haven.MainFrame.lambda$main$0(MainFrame.java:479)
at java.lang.Thread.run(Unknown Source)
Caused by: haven.Resource$ResourceClassNotFoundException: Could not find class haven.Rendered in resource ui/surv(v40)
at haven.Resource$CodeEntry$1$1.findClass(Resource.java:1299)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 17 more

[loftar]

You have this problem.