When you have the DNS address in the URL, the DNS address needs to resolve to the IP. In other words, ts.deffender.eu needs to resolve to 178.33.84.62. A ping shows that it resolves to 104.28.20.84, therefore it will not show the correct page.

Note: We cannot do much of anything to help you with the unrelated Cloudflare service. We can only tell you that you need a specific ip that the server responds to the query on and if you want to use a DNS address, a DNS address that points to that same IP.

Good luck! I hope you can find a satisfactory solution.