anchor.js and site.js files are not loaded

Doc files are generated successfully, but I can't expand folded instance member items in chrome browser. It seems anchor.js and site.js are not loaded in the browser.

I had checked in the chrome's dev tools. The elements ``
and `` are removed in the DOM tree.

I've also tried to load via http-server the doc files, not directly from the local files. But, the problem still exists.

It may not the problem of documentation.js, but I need help.

There generated doc files are attached.
[docs.zip](https://github.com/documentationjs/documentation/files/1132833/docs.zip)

Any ideas?