[Solved]On Click command button function

I do not get a 400 error. I do get a 1004 error if the current directory is not the one with the template file in it.

Adding the exact folder would help.

    Set NewBook = Workbooks.Open(thisworkbook.path & "\Job Template.xlsm")

You can no simply step into and through the macro as the Application.Caller value will cause an error.
You can trap for that

If IsError(Application.Caller) Then
    MsgBox "Not called via OnAction"
    Exit Sub
End If