Coveo.Search.Api.Proxy.CouldNotRetrieveSearchTokenException，无法检索搜索令牌？

Question

我正在coveo中配置sitecore。我正在按照下面给出的链接配置内部部署的步骤。

https://developers.coveo.com/display/public/SitecoreV3/Setting+Up+Coveo+for+Sitecore

https://developers.coveo.com/display/public/SearchREST/Windows+Service+Configuration+File

但我得到的是异常

Exception: Coveo.Search.Api.Proxy.CouldNotRetrieveSearchTokenException
Message: Could not retrieve a search token
Source: Coveo.Search.Api.Proxy
   at Coveo.Search.Api.Proxy.SearchTokenStore.RetrieveNewSearchToken(UserID[] p_UserIds)
   at Coveo.Search.Api.Proxy.SearchTokenStore.GetSearchToken(UserID[] p_UserIds)
   at Coveo.Search.Api.Proxy.ProxyHttpHandler.AddSearchTokenToRequest(HttpContext p_Context, HttpWebRequest p_Request)
   at Coveo.Search.Api.Proxy.ProxyHttpHandler.SetDefaultResponse(HttpContext p_Context)
   at Coveo.SearchProvider.Rest.SitecoreRestHttpHandler.OnReverseProxyRequest(HttpContext p_Context)
   at Coveo.Search.Api.Proxy.ProxyHttpHandler.ProcessRequest(HttpContext p_Context)

嵌套异常

Exception: System.Net.WebException
Message: The remote server returned an error: (403) Forbidden.
Source: System
   at System.Net.HttpWebRequest.GetResponse()
   at Coveo.Search.Api.Proxy.SearchTokenStore.RetrieveNewSearchToken(UserID[] p_UserIds)