This occurs when the executor cannot attach itself to the Roblox process. As Roblox frequently updates its anti-exploit systems, many free executors become obsolete temporarily. If you are using a browser-based executor or a "plugin," ensure the platform is fully "ready" before executing the script, as attempting to inject too early is a common cause of failure.
: Updated information and legitimate game tips are frequently shared in the King Legacy Discord king legacy zen hub script fix