Error 404 - Not found in every page

kzyweb

The issue

I used ionos shared hosting and i have acces ssh, i have every time Error 404 - Not found

kzyweb

my website SUNERIUM

luceos

I think using that iframe doesn't really help. Your real site is on flarum.cloud, why don't you customize the domain name through them: ask for help in the Free Flarum discussion https://discuss.flarum.org/d/7585-free-flarum-hosting-on-an-expert-platform-by-freeflarum-com