【403错误】获取元数据提示403错误

我肉身在日本，能够访问国家图书馆的网页并进行搜索

****************************** 国家图书馆ISBN插件 (1, 2, 1) ****************************** 
Found 0 results 
Downloading from 国家图书馆ISBN插件 took 0.20234942436218262 
未检测到isbn。
正在根据书名获取metadata...
Plugin 国家图书馆ISBN插件 failed
Traceback (most recent call last):
  File "calibre\ebooks\metadata\sources\identify.py", line 47, in run
  File "calibre_plugins.dummy1.__init__", line 446, in identify
  File "calibre_plugins.dummy1.__init__", line 96, in title2metadata
  File "calibre_plugins.dummy1.__init__", line 82, in get_dynamic_url
  File "urllib\request.py", line 216, in urlopen
  File "urllib\request.py", line 525, in open
  File "urllib\request.py", line 634, in http_response
  File "urllib\request.py", line 563, in error
  File "urllib\request.py", line 496, in _call_chain
  File "urllib\request.py", line 643, in http_error_default
urllib.error.HTTPError: HTTP Error 403: Forbidden

是墙的原因吗

DoiiarX / NLCISBNPlugin

【403错误】获取元数据提示403错误 #13