Need help with VBA - error 424 object required

This line is the issue:

Worksheets("DATA Referal numbers").Select

Full:

Sub AccumlatedDataforQuaterlyReports()
Dim LastRow As Integer, i As Integer, erow As Integer
LastRow = ActiveSheet.Range("A" & Rows.Count).End(xlUp).Row

For i = 2 To LastRow

Range(Cells(i, 1), Cells(i, 13)).Select
Selection.Copy
Workbooks.Open Filename:="\\thebridgeeastmidlands-my.sharepoint.com@SSL\personal\data_thebridge-eastmidlands_org_uk\Business Services\CST\16. Communications\14. Reporting\Quaterly Reports\MASTER REPORT.xlsx"
Worksheets("DATA Referal numbers").Select
erow = AactiveSheet.Cells(Rows.Count, 1).End(xlUp).Offset(1, 0).Row
ActiveSheet.Cells(erow, 1).Select
ActiveSheet.Paste
ActiveWorkbook.Save
ActiveWorkbook.Close
Next i
End Sub