quarto website rstudio github publishing error

Hi ,
below error message in github during publishing R studio quarto website project. pls help me to resolve it.


File not found

The site configured at this address does not contain the requested file.

If this is your site, make sure that the filename case matches the URL as well as any file permissions.
For root URLs (like http://example.com/) you must provide an index.html file.

Read the full documentation for more information about using GitHub Pages.

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