x86 letsgo error

[cctv130]

[hook_mem_unmapped]: 21 0xffa6971d 1 0
[hook_code] address: 0xFFA6971D size: 0xF1F1F1F1 what?
Traceback (most recent call last):
File "D:\tool/ida/plugins\novmpy\ui.py", line 17, in activate
vtil_graph.show_graph(ea)
File "D:\tool/ida/plugins\novmpy\views\vtil_graph.py", line 462, in show_graph
lifter.lift_il(None, VMState(current_handler=ea))
File "D:\tool/ida/plugins\novmpy\vm_lifter.py", line 92, in lift_il
assert parse_result
AssertionError

[Eagle1020]

I have the same problem when I use it