System.NullReferenceException: Object reference not set to an instance of an object.
   at InsuranceCommon.Utilities.SaveStringRequestResponse(String CompanyName, String Type, String data, String EnquiryNo) in C:\CODES\MailProject\InsuranceCommon\Utilities.cs:line 86
   at Insurance.Controller.ProposalController.<UploadfileondropboxnewAsync>d__6.MoveNext() in C:\CODES\MailProject\Insurance\Controller\ProposalController.cs:line 217