Hello,
Please consider using the one-page.html as a Starter File included in the Package/HTML Folder.
If you are using the Files from the Package/HTML/one-page Folder, you will need to change the CSS/JS Linking in the One Page HTML File you are planning to use and remove the ../ Link prefix and change other Links to one-page/ to make sure that the File Linkings are pointing to the Correct File Locations. Also, make sure to upload the one-page Folder to your Web Server as well since it contains the CSS File for the One Page Styling.
These are the following Folders/Files you will need for the One Page site:
css/ Folder
images/ Folder (However, you can delete the Images inside this Folder according to your Preference, but don't delete the images/icons/ Folder)
include/ Folder (However, you can delete the rs-plugin/ Folder)
js/ Folder
one-page/onepage.css File
style.css File
This will definitely work fine. Thanks for your Patience.
Meanwhile, do let us know if we can help you with anything else or if you find any further issues with Canvas.