This error message relates to the following errors: ERR100, ERR101, ERR125, ERR136, and ERR140.
You'll get the GAH! ERROR 2 message if there's a mailbox connection problem. Usually this will resolve itself with a short pause, then reload of the mailbox. If this doesn't immediately work, try these additional steps.
Restart your browser:
Sometimes the old "turn it off and on again" solution actually works! Just close out whatever browser you use, then start it back up again. Once the browser has been restarted, go to to mail.aol.com and enter your username and password.
Clear your cache, cookies, and history:
Another way you can fix the error messages is to clear your browser's cache, cookies, and history. Doing this will wipe out all the little unwanted bits of info that have been stored in your browser, resetting it and making it overall run better.