Pls help! error 1000 dns Problem since days now

Thx for the response ^^

So when I change:
-it to the server IP and http with port 80 and then I get a error with “This page isn’t working at the moment” to many times redirected
-it to the server IP and https with port 443 an error come up with “error 502 bad gateway
-and when I try to get there with https://ip an error come up with “Your connection isn’t private” and it doesn’t let me visit it anyways.

I am not sure were the problem now should be. Do you have a hint or so?