The error message “Preparing the Epic Games Launcher” appears when you try to start the Epic Games Launcher. This message ...
The error message “Pak is Invalid” occurs when Fortnite fails to load one or more of its game-data archive files (.pak files) ...
Python 3.9 will go end-of-life next week so Python 3.6 is far behind in the rearview mirror. If is impossible to upgrade your build platform then it is known to be insecure.