"We're currently experiencing an issue with DuckDuckGo Search. Thanks for your patience while we get our ducks in a row.

In the meantime, you can use other search engines right here by using "bangs":

    Google: !g why did youtube remove my subscriptions list
    Yahoo: !y why did youtube remove my subscriptions list
    Wikipedia: !w why did youtube remove my subscriptions list
    And many more."

This change just happened. I've been waiting on Ddg since ~10am in Frankfurt, Germany.