Server Error while filtering Enrollment Details in View History

Step:-
1.Login with Partner
2.Navigate to Search Employee
3.Search employee and click on Employee
4. Navigate to View history
5.Select Enrollment Details
6.Click on Search

Actual - Server Error on page

Expected - it should display enrollment details

Error Log-
ErrorID : 0
ErrorSource : ControllerAppTier.Save->WORKTERRAControllerAppTier.Save->AddChangeTermReport.Save->AddChangeTermReport.CreateDataForAddChangeTermReport->AddChangeTermReport.UpdateDatabase
ErrorMessage: Cannot bulk load because the file "\\192.168.31.21\WORKterra\Reports\BulkInsert_gljqijdpflmlv4otpifhgkmf.txt" could not be opened. Operating system error code 5(Access is denied.).
StackTrace: at WORKTERRA.Shared.WORKTERRAControllerAppTier.Save(WORKTERRAControllerWebTierEntity objWORKTERRAControllerWebTierEntity)
at WORKTERRA.ControllerAppTier.Save(Int32 intProjectsId, String strInput)
TargetSite: System.String Save(WORKTERRA.Shared.WORKTERRAControllerWebTierEntity)