[Yasuro]

When I try to specify the location of the k2pdfopt binary for the plugin, I get the following error. Plugin 0.5.3, Calibre 7.7.0, Windows 11.
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calibre, version 7.7.0
エラー: ハンドルされない例外: <b>NameError</b>:name 'os' is not defined

calibre 7.7 embedded-python: True
Windows-10-10.0.22621-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22621')
Python 3.11.5
Windows: ('10', '10.0.22621', 'SP0', 'Multiprocessor Free')
Interface language: ja
EXE path: C:\Program Files\Calibre2\calibre.exe
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (2, 10, 0) && DeDRM (10, 0, 3) && Package KFX (from KFX Input) (2, 10, 0) && Extract ISBN (1, 6, 2) && K2pdfopt Plugin (0, 5, 3) && KFX metadata reader (from KFX Input) (2, 10, 0) && From KFX (2, 10, 0) && KFX Input (2, 10, 0) && Obok DeDRM (10, 0, 3)
Traceback (most recent call last):
File "calibre_plugins.k2pdfopt_plugin.gui.config", line 103, in _choose_file
NameError: name 'os' is not defined