privatenumber
you: HTML.dudckduckgo.com
correct: html.duckduckgo.com
Compare both addresses. Did you enter an incorrect one on purpose?
To do this, you need to go to a search engine, such as mojeek.com, and search for anything. Then, go to your browser settings, search engines, and you should see the mojeek.com domain there. However, this won't work with html.duckduckgo.com, because duckduckgo.com domain is already added to search engines.