| GAH error occurs in AOL email when the user is unable to send or receive messages on AOL email. In that situation, don’t worry AOL customer support is always i.e. 24/7 available for you. You will get the assistance of technicians on this number and they will give you the best solution to your problem.
But before that, you should manually apply some methods to solve this issue. Check your internet connection, restart your web browser, and restart your computer etc. since these are the common troubleshooting steps.
Read more - https://www.customersupporthelpline.com/aol-customer-care-number/