cloudstack报错

[andylauyang]

我在WEB-UI界面中“网络”->“来宾网络”中点击“添加来宾网络”时，报如下错误
Unable to execute API command listnetworkofferings due to invalid value. 
Invalid parameter zoneid value=null due to incorrect long value format, or 
entity does not exist or due to incorrect parameter annotation for the field in 
api cmd class.　请问会是什么原因导致的？