microsoft excel - Hide & Unhide macros won't work after locking columns & protecting sheet

I have two columns, E & G, that have formulas in them, so I locked those columns and protected the sheet they're in. I have two buttons on the sheet a Hide & Unhide button. After locking those columns & protecting the sheet, those macros assigned to those buttons do not work anymore. When I select the buttons, I receive a run-time error '1004', unable to set the Hidden property of the Range class.
The macro's code are as follows:

Sub Hide()
'

' Hide Macro
'
' Keyboard Shortcut: Ctrl+Shift+H
'
    For Each c In Range("C7:C446")
    If IsEmpty(c.Value) Then
    'If (c.Value) = "" Then
     c.EntireRow.Hidden = True
    End If
    Next c


End Sub

Unhide macro:

Sub UH()
'
' UH Macro
'


'
    Rows("6:447").Select
    Selection.EntireRow.Hidden = False
End Sub

I think I have to add an unprotect command, which I've tried but it doesn't seem to work. I've tried:

Worksheets("JE").Unprotect Password:="ImportLCPA17", UserInterfaceOnly:=True

does anyone know of any adjustments I can make to have those hide & unhide macros, linked to the buttons, work while still having those columns locked?