WHY? Pasword Protect The VBA Editor Error

See the attached.

Read comments highlighted. Isn't everything on the Internet "true" ? :-)

    '' Rename new sheet to "Format".
    wb2.Sheets("Sheet4 (2)").Name = "Sheet4"
    wb2.Sheets("Sheet4").ScrollArea = "$A$1"        '<-----<<<<< I acquired this syntax from the Internet and it isn't working.
    wb1.Sheets("Sheet4").ScrollArea = "$A$1"        '<-----<<<<< I acquired this syntax from the Internet and it isn't working.
    wb2.Save
    wb2.Close
    Application.ScreenUpdating = True

When I have tried to prevent scrolling on my workbooks,
I use the entire area that the user is allowed to work with,
not a single cell as in your example above.

example

    wb1.Sheets("Sheet4").ScrollArea = "$A$1:$T$45"

When I need to prevent scrolling on a worksheet,
I use the entire area that the user is allowed to work with,
not a single cell as in your example above.

example

    Sheets("Sheet4").ScrollArea = "$A$1:$T$45"

Nothing "Cannot be done" it is a hiccup at most -

Below I am posting a couple code that will loop through all sheets in your file and constrain the scroll area to A1 -

Private Sub Workbook_Open()

    Dim wb As Workbook
    Dim ws As Worksheet
    Dim Pwd As String
    
With Application
    .ScreenUpdating = False
    .Calculation = xlCalculationManual
    .EnableEvents = False
End With
    
    Set wb = ActiveWorkbook
    
    Pwd = "YOURPASSWORD"

    For Each ws In wb.Worksheets
        ws.Unprotect Password:=Pwd
        ws.ScrollArea = "$A$1:$A$1"
        Call Protect_WS(ws, Pwd)
    Next ws

With Application
    .ScreenUpdating = True
    .Calculation = xlCalculationAutomatic
    .EnableEvents = True
End With

End Sub

It calls on Protect_WS which is to password protect each sheet individually and apply properties that you desire...
Be sure to change the True/False to the desired protection

Sub Protect_WS(ws As Worksheet, Pwd As String)

        ws.Protect _
        Password:=Pwd, _
        DrawingObjects:=False, _
        Contents:=True, Scenarios:=False, _
        AllowFormattingCells:=True, _
        AllowFormattingColumns:=True, _
        AllowFormattingRows:=True, _
        AllowInsertingColumns:=True, _
        AllowInsertingRows:=True, _
        AllowInsertingHyperlinks:=True, _
        AllowDeletingColumns:=True, _
        AllowDeletingRows:=True, _
        AllowSorting:=True, _
        AllowFiltering:=True, _
        AllowUsingPivotTables:=True
End Sub

IF YOU DONT WANT TO PASSWORD PROTECT INDIVIDUAL SHEETS THEN CHANGE THE CODE TO THIS FOR OPEN_WORKBOOK

Private Sub Workbook_Open()

    Dim wb As Workbook
    Dim ws As Worksheet
    
With Application
    .ScreenUpdating = False
    .Calculation = xlCalculationManual
    .EnableEvents = False
End With
    
    Set wb = ActiveWorkbook
    

    For Each ws In wb.Worksheets
        ws.ScrollArea = "$A$1:$A$1"
    Next ws

With Application
    .ScreenUpdating = True
    .Calculation = xlCalculationAutomatic
    .EnableEvents = True
End With

End Sub

Here is a file with the code embedded on a blank sheet.

TESTME.xlsm
Password is the file name "TESTME"

NOTE - By locking down the area to just $A$1 this will prevent the user from being able to navigate around the sheet... is that what you really want? Personally I would lock areas to used ranges... but I do not know the desired outcome so for now... See if this works for what you were attempting...