Rudder

Log tells:

[2019-01-29 11:06:11] ERROR net.liftweb.http.LiftRules - Exception being returned to browser when processing /lift/ajax/F765881636879KZV5NX-40/
java.util.NoSuchElementException: key not found: showEditForm
        at scala.collection.immutable.Map$Map2.apply(Map.scala:135)
        at com.normation.rudder.web.snippet.configuration.RuleManagement.editRule(RuleManagement.scala:153)
        at com.normation.rudder.web.snippet.configuration.RuleManagement.onCreateRule(RuleManagement.scala:163)
        at com.normation.rudder.web.snippet.configuration.RuleManagement.$anonfun$viewRules$2(RuleManagement.scala:125)
        at com.normation.rudder.web.components.popup.CreateOrCloneRulePopup.onSubmit(CreateRulePopup.scala:209)
        at com.normation.rudder.web.components.popup.CreateOrCloneRulePopup.$anonfun$popupContent$11(CreateRulePopup.scala:115)
        at net.liftweb.http.S$NFuncHolder.$anonfun$apply$3(S.scala:184)
        at scala.collection.immutable.List.map(List.scala:283)
        at net.liftweb.http.S$NFuncHolder.apply(S.scala:184)
        at net.liftweb.http.S$ProxyFuncHolder.apply(S.scala:113)
        at net.liftweb.http.LiftSession.$anonfun$runParams$8(LiftSession.scala:600)
        at net.liftweb.http.LiftSession.$anonfun$runParams$17(LiftSession.scala:613)
        at scala.collection.immutable.List.map(List.scala:287)
        at net.liftweb.http.LiftSession.$anonfun$runParams$13(LiftSession.scala:613)
        at scala.collection.immutable.List.flatMap(List.scala:335)
        at net.liftweb.http.LiftSession.runParams(LiftSession.scala:603)
        at net.liftweb.http.LiftServlet.liftedTree2$1(LiftServlet.scala:609)