Are you trying to open RuneScape via an old "RuneScape Launcher", or are you launching it via the new "Jagex Launcher"?
If the former, then this won't work anymore (based on you already transferring to a Jagex Account).
If the latter, then you will only need to type your password in periodically. Essentially, you won't need your password every time you want to access the game.
~A~
24-Sep-2023 23:22:48