But now it is full blank. I try to enable the “Development Mode” in Cloudflare, or use a uncached version Data Recovery Blog, then everything is fine. If disable the “Development Mode” or just visit Data Recovery Blog, then still blank page, even if I press Ctrl + F5 to refresh the page for multiple times.
It looks like you have a Cache Everything page rule, so it’s difficult to know why Cloudflare cached a blank page. Try disabling that rule and see if it helps.