Thanks for your reply.
I also thought that it might be the problem of path, because the
... in the error message was really odd to me.
I checked the path, there are many subfolders under the path
myBlog\public\authors\, a folder name as "admin" is one of them. Is there any way that I can specify which folder should
serve_site() use to build site?
About the reproducible example, I agree with you. But it's hard for me to provide that code, because basically
serve_site() was the only code I run. I guess the only way to let others' to reproduce this error would be uploading the public folder to github. Do you have any suggestions?