metadata contains a reference that cannot be resolved

Hello,

I am getting error 
Metadata contains a reference that cannot be resolved: 'sftplah.api.crm8.dynamics.com/.../Organization.svc'.

when i run the following code

Dictionary<string, string> attributesData = new Dictionary<string, string>();
RetrieveAllEntitiesRequest metaDataRequest = new RetrieveAllEntitiesRequest();
RetrieveAllEntitiesResponse metaDataResponse = new RetrieveAllEntitiesResponse();
metaDataRequest.EntityFilters = EntityFilters.Entity;

metaDataRequest.RetrieveAsIfPublished = true;

// Execute the request.

metaDataResponse = (RetrieveAllEntitiesResponse)organizationService.Execute(metaDataRequest);

var entities = metaDataResponse.EntityMetadata;
return entities;