gitbook不能解析html

Question

我在docker下启动gitbook，但是无法解析html，可以解析md文件。请问有遇到的朋友吗？
docker run --rm -v "$PWD:/gitbook" -p 4000:4000 billryan/gitbook gitbook serve
Live reload server started on port: 35729
Press CTRL+C to quit ...

info: 7 plugins are installed
info: loading plugin "livereload"... OK
info: loading plugin "highlight"... OK
info: loading plugin "search"... OK
info: loading plugin "lunr"... OK
info: loading plugin "sharing"... OK
info: loading plugin "fontsettings"... OK
info: loading plugin "theme-default"... OK
info: found 2 pages
info: found 18 asset files
error: error while generating page "1.html":

FileNotParsableError: "1.html" file cannot be parsed