My websites ablefast.com keep redirecting to origin host.
What do you mean by that? Your site is behind Cloudflare and loads fine.
After uploading some app from Cloudfare, my websites all keep bringing “404 Not Found” response if I refresh.
Now I uninstalled all app and yet still getting same response.
I’d check the browser cache and maybe the hosts file.
Your site loads fine and there is no 404. You can also check this in the details at http://sitemeer.com/#https://ablefast.com/
Otherwise please elaborate what you mean by “origin host” and “uploading some app” and where you get the error.