calibre, version 7.2.0
错误： 未处理的异常: InvalidPlugin:The plugin in 'D:\Download\NLCISBNPlugin-1.0.0.zip' is invalid. It does not contain a top-level init.py file

calibre 7.2 embedded-python: True
Windows-10-10.0.22635-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22635')
Python 3.11.5
Windows: ('10', '10.0.22635', 'SP0', 'Multiprocessor Free')
Interface language: zh_CN
Traceback (most recent call last):
File "calibre\gui2\preferences\plugins.py", line 325, in add_plugin
File "calibre\customize\ui.py", line 513, in add_plugin
File "calibre\customize\ui.py", line 64, in load_plugin
File "calibre\customize\zipplugin.py", line 298, in load
File "calibre\customize\zipplugin.py", line 393, in _locate_code
calibre.customize.InvalidPlugin: The plugin in 'D:\Download\NLCISBNPlugin-1.0.0.zip' is invalid. It does not contain a top-level init.py file