If some aspect of Bolt doesn’t work, you would need to contact Bolt’s support regarding it:
https://support.bolt.new/external-resources/overview
It’s likely you’re deploying files that are nested in a folder, and/or lack an index.html at the root.
Read this Support Guide:
https://answers.netlify.com/t/support-guide-i-ve-deployed-my-site-but-i-still-see-page-not-found/125
Use the Deploy File Browser to check what files you’re deploying.