Your app hasn’t made enough calls to the Graph API to show any info, or there are no changes for the methods you selected between v2.3 and v2.9.
The alert you have received mentions that your app is still using v2.0 API calls. Due to the way platform related web requests are logged on our side, this may include uses of the Login Dialog if it was invoked without an explicit version in the URL.
If your app’s minimum API version is v2.1 or above (you can verify this in the app settings “Dashboard” page), you don’t need to do anything, and you can ignore this alert.
If your app’s minimum API version is v2.0, we recommend that you vet your app’s code and look for Platform Integrations (API calls) that explicitly use v2.0. You can then proceed to upgrade those. If you are certain that you are not using v2.0, you can also ignore this alert.
Since you should not be blocked by this issue, I am now closing this bug report.
Our app recently got this alert message
This appears be a valid bug, and I am assigning this to the appropriate team.