Unplug the power source and, if possible, remove the battery.
Sometimes deleting the local patches.plist (found in the Flex directory via Filza) can force the app to refresh its listing. Adobe Flex 3 (SDK/Builder) patch listing error flex 3
Before applying a patch, you must understand why your environment is throwing this error. Based on thousands of forum threads (Stack Overflow, Adobe JIRA, Apache Flex Bug Tracker), the primary causes are: Unplug the power source and, if possible, remove the battery
Windows: C:\ProgramData\FLEXnet\ macOS/Linux: /var/flexlm/ Unplug the power source and
Fix : Try logging out and back into your Flex account within the app settings.
If the error persists, close Flex Builder, then delete: