Download the base Flex SDK from: https://archive.apache.org/dist/flex/4.16.1/binaries/apache-flex-sdk-4.16.1-bin.zip
If the problem persists, try these general techniques: patch listing error flex 3
"C:\Program Files\Java\jdk1.8.0_202\bin\java.exe" -jar flex_sdk_installer-4.0.jar Download the base Flex SDK from: https://archive
Restart and re-import projects.
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Using an outdated beta version (e.g., Beta 43 vs. Beta 98) on a newer iOS version frequently triggers listing issues. Step-by-Step Troubleshooting 1. Check Your Internet and DNS