Sharepoint Site Collection Provisioning Tenant CreateSite error

I have a SharePoint Online provider hosted app running in Azure.  I am provisioning a site collection using the code below.  When it gets to ExecuteQuery() I get the error "Cannot find the endpoint specified by the configuration file".  The error does not happen all the time.  It's intermitent which makes troubleshooting even harder.  I would appreciate any input you may have.  Thanks.

                var tenant = new Tenant(adminCtx);  

                var properties = new SiteCreationProperties()
                {
                    Url = newSiteUrl,
                    Owner = adminUser
                    Title = newSiteTitle,                       
                    StorageMaximumLevel = Convert.ToInt64(storageMaximumLevel),
                    UserCodeMaximumLevel = Convert.ToInt64(useCodeMaximumLevel)

                };
                   
                //start the SPO operation to create the site
                SpoOperation op = tenant.CreateSite(properties);
                adminCtx.Load(tenant);
                adminCtx.Load(op, i => i.IsComplete);
               adminCtx.ExecuteQuery();