Microsoft.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 40 - Could not open a connection to SQL Server)
   at Microsoft.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at Microsoft.Data.SqlClient.SqlConnection.Open(SqlConnectionOverrides overrides)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternal(Boolean errorsExpected)
   at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.InitializeReader(Enumerator enumerator)
   at Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy.ExecuteImplementation[TState,TResult](Func`3 operation, Func`3 verifySucceeded, TState state)
   at Microsoft.EntityFrameworkCore.Storage.ExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.MoveNext()
   at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Boolean& found)
   at lambda_method3804(Closure, QueryContext)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   at DBMR_WEB.Areas.admin.Controllers.SitemapController.GetLatestNucleusReportDate() in C:\Users\Dbmr Parasharam\source\repos\Databridgemarketresearch-com\DBMR-WEB_new_design\DBMR-WEB\Controllers\sitemapController.cs:line 292
   at DBMR_WEB.Areas.admin.Controllers.SitemapController.WriteExtraUrls(XmlWriter writer, String language) in C:\Users\Dbmr Parasharam\source\repos\Databridgemarketresearch-com\DBMR-WEB_new_design\DBMR-WEB\Controllers\sitemapController.cs:line 98
   at DBMR_WEB.Areas.admin.Controllers.SitemapController.GenerateSitemapXml222(String language) in C:\Users\Dbmr Parasharam\source\repos\Databridgemarketresearch-com\DBMR-WEB_new_design\DBMR-WEB\Controllers\sitemapController.cs:line 161
   at DBMR_WEB.Areas.admin.Controllers.SitemapController.Index(String language) in C:\Users\Dbmr Parasharam\source\repos\Databridgemarketresearch-com\DBMR-WEB_new_design\DBMR-WEB\Controllers\sitemapController.cs:line 75
ClientConnectionId:00000000-0000-0000-0000-000000000000