If Statement Issue

I'm getting a Run-time error '1004': Application-defined or object-defined error. Occuring on the bolded line below.
That line is simply trying to check .Range(Row, 8) against "y". The Row variable is retaining the correct correct value so I'm confident that the issue isn't with that. I think I am referencing the worksheet incorrectly?.... Thanks in advance for any help or suggestions.

Originally CStr() was not included, however I am getting the same error before and after the change.

            For Each cell In Worksheets("Change Master Task List").Range("M:M")
                If CInt(c(i, j)) = cell.Value Then
                    Row = cell.Row
                    If CStr(Worksheets("Change Master Task List").Range(Row, 8)) = "y" Then
                        c(i, j).Interior.ColorIndex = 23
                    End If
                End If
            Next cell

Cells(row, 8) works I believe... A little confused as to why it does

TMS ~ What is your advice? c(i, j) is working and is a defined range.

Kaper ~ As you see in the code below, cells(row, 8) would be out of range of the defined range for the For loop;

For Each cell In Worksheets("Change Master Task List").Range("M:M")

I'm trying to reference (row, 8) of that whole worksheet, cells(row,8) wouldn't reference outside of the ("M:M") Range correct?

c = Worksheets("Timeline").Range("B82:BI762")                                

For i = 1 To Worksheets("Timeline").Range("B82:BI762").Rows.Count            
    For j = 1 To Worksheets("Timeline").Range("B82:BI762").Columns.Count
        If IsEmpty(c(i, j)) Then
            
        Else
            For Each cell In Worksheets("Change Master Task List").Range("M:M")
                If CInt(c(i, j)) = cell.Value Then
                    Row = cell.Row
                    If CStr(Worksheets("Change Master Task List").Range(Row, 8)) = "y" Then
                        c(i, j).Interior.ColorIndex = 23
                    End If
                End If
            Next cell
        End If
    Next j
Next i