The users weren't unable to access their funds. However, Ledger Live (their desktop and mobile app) uses nodes hosted by Ledger, so effectively this meant that non-technical users who relied on their hosted nodes couldn't access their funds.

One could (and should!) still use the same wallet with a self-hosted node, or a third-party one, by using the wallet with a different software (which is also officially supported; Ledger provides docs for doing so).