While using AOL mail may usually encounter with the HTTP error 504 gateway timeout that needs to be fixed with these steps:
• Firstly you should try to reboot the system and also restart the router and modem to fix the issue.
• You also may get error 504 gateway timeout that will prevent you from opening the page. So you should wait and keep pressing the F5 key to refresh the page.
• You should review the proxy settings of the browser and try to find the issue. Reinstalling the browser may also remove the issue.
You can also contact at AOL email customer care number and get the prominent support from the experts.