Traceback (most recent call last):


 "site-packages\calibre\customize\ui.py", line 170, in _run_filetype_plugins


 "calibre_plugins.ignobleepub.__init__", line 319, in run
IGNOBLEError: IgnobleEpub - No keys found. Plugin not configured.

Traceback (most recent call last):


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\site-packages\aiohttp\connector.py", line 936, in _wrap_create_connection

return await self._loop.create_connection(*args, **kwargs)
# type: ignore
# noqa


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\asyncio\base_events.py", line 1050, in create_connection

transport, protocol = await self._create_connection_transport(


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\asyncio\base_events.py", line 1080, in _create_connection_transport

await waiter


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\asyncio\sslproto.py", line 529, in data_received

ssldata, appdata = self._sslpipe.feed_ssldata(data)


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\asyncio\sslproto.py", line 189, in feed_ssldata

self._sslobj.do_handshake()


 "C:\Users\asus\AppData\Local\Programs\Python\Python38-32\lib\ssl.py", line 944, in do_handshake

self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1108)
