Object has no attributes?

[bumpys]

Application crashed at 93% removing dupe files; many of them from C:/Users/j..... so some of the selected files had "access denied" anyway, e.g. files in use by Edge browser

Application Name: dupeGuru
Version: 4.3.1
Python: 3.8.13
Operating System: Windows-10-10.0.19045-SP0

Traceback (most recent call last):
File "hscommon\gui\progress_window.py", line 107, in pulse
File "core\app.py", line 332, in _job_error
File "hscommon\jobprogress\performer.py", line 46, in _async_run
File "core\app.py", line 234, in _do_delete
File "core\results.py", line 307, in perform_on_marked
File "core\results.py", line 320, in remove_duplicates
AttributeError: 'NoneType' object has no attribute 'dupes'