If you're encountering an activation error on disneyplus.com/begin, there are several steps you can take to resolve the issue. First, ensure you're entering the correct activation code displayed on your TV screen. Double-check your internet connection, as a weak or unstable connection may cause errors. Clear your browser's cache and cookies or try using a different browser or device. If the issue persists, log out of your Disney Plus account, then log back in and attempt the activation again. For continued issues, contact Disney Plus customer support for further assistance with disneyplus.com/begin activation errors.