Error Loading MongoDB

GlobalFunction.LoadXMLFromTextError.254 = Err.number :424
Error Description : Object required ,
Path:: /string
Return Value :System.NullReferenceException: Object reference not set to an instance of an object. at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.Open() at CMSServices.Data.SqlUtils.ExecuteReader(String sql, List`1 parameters) in C:\WebProjects\CodeCreator\CSCOCMS\CMSServices\CMSServices\Data\SqlUtils.cs:line 172 at CMSServices.Data.Queries.GetAllVariablesInNameSpace(String nameSpace) in C:\WebProjects\CodeCreator\CSCOCMS\CMSServices\CMSServices\Data\Queries.cs:line 35 at CMSServices.CGLCompiler.CGLCompileByContent(String iLanguage, String TemplateContents, String sNameSpace, String MasterCallerRecordID, String passedPageParam, String passedSessionParam, String TableConfigName, String ClientAddress) in C:\WebProjects\CodeCreator\CSCOCMS\CMSServices\CMSServices\CGLCompiler.asmx.cs:line 430