This is a heads-up! The built-in AWeber SDK will be removed starting with version 4.2.0 of the Gravity Forms AWeber Add-On.
If you had an active connection before version 4.0.0, be sure to reconnect your AWeber account and update your integration settings before upgrading. Otherwise, your AWeber connection will stop working and prevent contacts from being added to your lists.
To avoid any issues, we recommend making these updates now.
Additional information in our documentation here.