error with REST requests

We downloaded and installed the nightly build (3.6.2-SNAPSHOT). But this version is somehow unstartable...

An error has occured during startup:

java.lang.UnsatisfiedLinkError: org.mozilla.xpcom.internal.XPCOMImpl.getServiceManager()Lorg/mozilla/interfaces/nsIServiceManager;
at org.mozilla.xpcom.internal.XPCOMImpl.getServiceManager(Native Method)
at org.mozilla.xpcom.Mozilla.getServiceManager(Mozilla.java:867)
at com.teamdev.xpcom.util.ProxyManager.<init>(Unknown Source)
at com.teamdev.xpcom.util.ProxyManager.getInstance(Unknown Source)
at com.teamdev.xpcom.b.invokeLater(Unknown Source)
at com.teamdev.xpcom.Xpcom.invokeLater(Unknown Source)
at com.teamdev.xpcom.a.a.setType(Unknown Source)
at com.eviware.soapui.support.components.BrowserComponent.updateProxy(BrowserComponent.java:846)
at com.eviware.soapui.impl.wsdl.support.http.ProxyUtils.setProxyEnabled(ProxyUtils.java:183)
at com.eviware.soapui.SoapUI.buildToolbar(SoapUI.java:306)
at com.eviware.soapui.SoapUI.buildUI(SoapUI.java:258)
at com.eviware.soapui.SoapUI.show(SoapUI.java:927)
at com.eviware.soapui.SoapUI.startSoapUI(SoapUI.java:790)
at com.eviware.soapui.SoapUIPro.b(SourceFile:267)
at com.eviware.soapui.SoapUIPro.a(SourceFile:192)
at com.eviware.soapui.SoapUIPro$SoapUIProRunner.run(SourceFile:1202)
at com.eviware.soapui.SoapUIPro.main(SourceFile:233)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
at com.exe4j.runtime.WinLauncher.main(Unknown Source)