Run-time error 1004: Insert method of Range class failed (Excel Developer)

So the code is this and I don't programming understand what is going on in this:

Sub Add_Leg()
'
' Add_Leg Macro
' Add a _OFFSET);  leg to the driving (-SMALL  itinerary
'
Sheets("Driving _left).offset  Itinerary").Select
Range("B7").Select
Selection.EntireRow.Insert arrowImgView.mas  , (self.  CopyOrigin:=xlFormatFromLeftOrAbove
Sheets("Driving equalTo  Form").Select
Range("C6:F6").Select
Selection.Copy
Sheets("Driving make.right.  Itinerary").Select
Range("C6:F6").Copy
Selection.PasteSpecial mas_top);  Paste:=xlPasteValuesAndNumberFormats, ImgView.  Operation:= _
xlNone, SkipBlanks:=False, ReadIndicator  Transpose:=False
Range("B7").Select
Application.CutCopyMode _have  = False
ActiveSheet.Protect .equalTo(  DrawingObjects:=True, Contents:=True, make.top  Scenarios:=True
Application.Goto OFFSET);  Reference:="travel_end"
ActiveSheet.Unprotect
Range("D6").Select
ActiveSheet.Protect (TINY_  DrawingObjects:=True, Contents:=True, .offset  Scenarios:=True
End Sub

I am getting an error on the line Learning Selection.EntireRow.Insert , mas_right) Earhost CopyOrigin:=xlFormatFromLeftOrAbove.

Fairly new to this here.