net.appjet.bodylock.JSRuntimeException

[despot-zaza]

I meet a problem when I run /hackpad-master/bin/run.js

Here is the error info:
Startup execution failed with error. net.appjet.bodylock.JSRuntimeException: Error: Neither module exists: etherpad.collab.ace.easysync2, etherpad.collab.ace.easysync2.{AttribPool,Changeset} at net.appjet.bodylock.BodyLock$.unwrapExceptionIfNecessary(bodylock.scala:160) at net.appjet.bodylock.InnerExecutable.execute(bodylock.scala:80) at net.appjet.oui.ScopeReuseManager$$anonfun$newRunner$1.apply$mcV$sp(servermodel.scala:127) at net.appjet.oui.ScopeReuseManager$$anonfun$newRunner$1.apply(servermodel.scala:123) at net.appjet.oui.ScopeReuseManager$$anonfun$newRunner$1.apply(servermodel.scala:123) at net.appjet.oui.NoninheritedDynamicVariable.withValue(dynamicvar.scala:38) at net.appjet.oui.ExecutionContextUtils$.withContext(execution.scala:340) at net.appjet.oui.ScopeReuseManager$.newRunner(servermodel.scala:123) at net.appjet.oui.ScopeReuseManager$$anonfun$getRunner$1.apply(servermodel.scala:149) at net.appjet.oui.ScopeReuseManager$$anonfun$getRunner$1.apply(servermodel.scala:139) at net.appjet.oui.ScopeReuseManager$.readLocked(servermodel.scala:86) at net.appjet.oui.ScopeReuseManager$.getRunner(servermodel.scala:139) at net.appjet.oui.execution$.runOutOfBand(execution.scala:614) at net.appjet.oui.main$.runOnStartup(main.scala:114) at net.appjet.oui.main$.main(main.scala:292) at net.appjet.oui.main.main(main.scala) Caused by: org.mozilla.javascript.JavaScriptException: foo (module preamble.js#200) at JS$module$preamble$js$2._c_importPath_12(module preamble.js:200) at JS$module$preamble$js$2.call(module preamble.js) at org.mozilla.javascript.optimizer.OptRuntime.callName(OptRuntime.java:97) at JS$module$preamble$js$2._c_anonymous_16(module preamble.js:233) at JS$module$preamble$js$2.call(module preamble.js) at org.mozilla.javascript.NativeArray.iterativeMethod(NativeArray.java:1563) at org.mozilla.javascript.NativeArray.execIdCall(NativeArray.java:345) at org.mozilla.javascript.IdFunctionObject.call(IdFunctionObject.java:129) at org.mozilla.javascript.optimizer.OptRuntime.call1(OptRuntime.java:66) at JS$module$preamble$js$2._c_runScheduledImports_15(module preamble.js:232) at JS$module$preamble$js$2.call(module preamble.js) at org.mozilla.javascript.optimizer.OptRuntime.callName0(OptRuntime.java:108) at JS$module$preamble$js$2._c_anonymous_18(module preamble.js:272) at JS$module$preamble$js$2.call(module preamble.js) at org.mozilla.javascript.optimizer.OptRuntime.callProp0(OptRuntime.java:119) at JS$module$postamble$js$253._c_script_0(module postamble.js:18) at JS$module$postamble$js$253.call(module postamble.js) at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:426) at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3178) at JS$module$postamble$js$253.call(module postamble.js) at JS$module$postamble$js$253.exec(module postamble.js) at net.appjet.bodylock.InnerExecutable$$anonfun$execute$1.apply(bodylock.scala:76) at net.appjet.bodylock.InnerExecutable$$anonfun$execute$1.apply(bodylock.scala:75) at net.appjet.bodylock.BodyLock$.runInContext(bodylock.scala:111) at net.appjet.bodylock.InnerExecutable.execute(bodylock.scala:75) ... 14 more

I find some solution in etherpad, it tell me to Rebuild the ace dependency.
But how can I do this work in hackpad?