Possible causes

  • Using a Web browser that's not supported by AOL Mail
  • Accessing your AOL Mail account simultaneously from 2 different browsers
  • Accessing your AOL Mail account on multiple devices simultaneously from more than one place

Possible fixes

  • Restart your Web browser
  • Clear your Web browser's cache.
  • Make sure you're using a supported Web browser and operating system (OS)
  • Sign out of all devices and sign back in to AOL Mail to see if the error is gone
  • If the problem persists we recommend using an email app like the AOL app for iOS and Android or the native mail app on your smartphone or tablet device