Import is getting failed for Special characters like '
Consider all Characters which are accepted through Ui On import DTS:

Refer Below Error Log:

ErrorID : 0
ErrorSource : ControllerAppTier.SaveAndGetData->WORKTERRAControllerAppTier.SaveAndGetData->ExecuteImportDTS.ImportData_Isolated->WTIsolatedRoutines.Main->ExecuteImportDTS.ImportData->ImportValidation.ImportData->ImportValidation.ProcessImportDataFile->ImportValidation.ValidateAndInsertData->ImportValidation.CreateUserForEmployee->ImportValidation.GenerateUserInsertQuery
ErrorMessage: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
StackTrace: at WORKTERRA.Shared.WORKTERRAControllerAppTier.SaveAndGetData(WORKTERRAControllerWebTierEntity objWORKTERRAControllerWebTierEntity)
at WORKTERRA.ControllerAppTier.SaveAndGetData(Int32 intProjectsId, String strInput)
TargetSite: System.String SaveAndGetData(WORKTERRA.Shared.WORKTERRAControllerWebTierEntity)