Sphinx - 加载酸洗环境......失败：[Errno 2]没有这样的文件或目录

Question

当我生成文档时，我收到以下错误：

loading pickled environment... failed: [Errno 2] No such file or directory: '/home/me/project/.doctrees/environment.pickle'

事情就是文件确实存在：

[me@server project]$ ls -al /home/me/project/.doctrees/environment.pickle
-rw-rw-r-- 1 me group 723522 Feb 28 15:52 /home/me/project/.doctrees/environment.pickle

有什么想法吗？