I know nothing of AOL, other than I will never use it, it was ghastly decades ago and I doubt that the passage of time has improved it much, and you don't say if it ever worked or whether its a web browser or whether you are using a mail app, however:-
Any weirdness with a web browser, clear cache and if that fails cookies, or just do both. You will lose any saved logins when you clear cookies.
Good luck.