Error when attempting to update

Before the error happened, I attempted to update my add-ons.

Error message (don't change this)
Anki 2.1.61 (0c1eaf4c) Python 3.9.15 Qt 6.3.2 PyQt 6.3.1
Platform: macOS-13.4.1-arm64-arm-64bit
Flags: frz=True ao=True sv=3
Add-ons, last update check: 2023-07-08 15:10:41

Traceback (most recent call last):

  File "aqt.taskman", line 122, in _on_closures_pending

  File "aqt.taskman", line 71, in <lambda>

  File "decorator", line 232, in fun

  File "anki.hooks", line 89, in decorator_wrapper

  File "anki.hooks", line 86, in repl

  File "/Users/ken/Library/Application Support/Anki2/addons21/1322529746/addons.py", line 52, in _check_future_for_exceptions
    future.result()

  File "concurrent.futures._base", line 439, in result

  File "concurrent.futures._base", line 391, in __get_result

  File "concurrent.futures.thread", line 58, in run

  File "aqt.addons", line 1168, in <lambda>

  File "aqt.addons", line 1184, in _download_all

  File "aqt.addons", line 1129, in download_and_install_addon

  File "aqt.addons", line 430, in install

  File "aqt.addons", line 453, in _install

  File "decorator", line 232, in fun

  File "anki.hooks", line 89, in decorator_wrapper

  File "anki.hooks", line 84, in repl

  File "decorator", line 232, in fun

  File "anki.hooks", line 89, in decorator_wrapper

  File "anki.hooks", line 84, in repl

  File "aqt.addons", line 726, in backupUserFiles

OSError: [Errno 66] Directory not empty: '/Users/ken/Library/Application Support/Anki2/addons21/1322529746/user_files' -> '/Users/ken/Library/Application Support/Anki2/addons21/files_backup'

Sentry link (for developers)