If you are trying to "fix" a 404 error in your application, Fresh provides dedicated ways to handle missing routes:
: Ensure your basePath is configured correctly in deno.json if you are hosting your app in a subdirectory. Releases · denoland/fresh - GitHub
If your "Fresh 4.0.4" issue persists, try these standard recovery steps: Fresh 4.0.4 fix
: Significant fixes have improved state retention in islands during development, preventing the full-page reloads that previously plagued island updates. Troubleshooting Checklist
: Common causes for unexpected 404s include mismatching case in URL paths or missing/extra trailing slashes, which Fresh handles strictly by default. Recent Release Fixes (Fresh 2.0+ Context) If you are trying to "fix" a 404
: You can create a file at routes/_404.tsx to define a custom UI for when users hit a non-existent URL.
: If dependency version mismatches are causing errors, deleting your deno.lock and rerunning deno install can resolve stubborn routing or build issues. Recent Release Fixes (Fresh 2
: A fix was implemented to add cache-bust query parameters to Vite asset URLs for better immutable caching.