If you’ve upgraded to Android Studio Ladybug (2024.2.1) you’ll need to update the Gradle plugin as well Please follow this link and make sure to use version 8.5 or 8.9 Compatibility Matrix

If upgrading Gradle causes any issues with older Kotlin or Java libraries, you might need to update those libraries as well. In my case, I encountered problems because some Kotlin libraries didn’t have updates available yet. To resolve the issue, I had to downgrade both Android Studio and Flutter by one version. Upgrading the project could also lead to namespace issues in Kotlin/Java libraries.

You can open the android folder separately in Android Studio and use the Android Gradle Plugin (AGP) to upgrade the project. It might take some time for everything to stabilise, but I hope this helps.