I made an index file, and I had setting to release a URL of MyVolume in AMI, but I can not open it.

The access permission may not be set definitely.
With reference to the following pages, please set access permission definitely.

　https://docs.sic.shibaura-it.ac.jp/makehp/step_e04/index.html

Please set an appropriate thing after having checked it about the set point of access permission by yourself.

In the URL mentioned above, you set it with "755" in public_html, but please set it after having understood a meaning, and  be released.