IS-EO-FAILED_OP_START error in Epic Games Launcher

This error can appear when installing, uninstalling, or verifying a game in the Epic Games Launcher. If you then try to cancel the operation, you may also receive an Unknown Error Occurred message.

Restarting the launcher and making sure it is up to date usually resolves this error.

1. Exit any games that are currently running, including games launched through other launchers.
2. Exit and restart the Epic Games Launcher. Refer to How to restart the Epic Games Launcher.
3. Make sure that your launcher is updated. Refer to Update the Epic Games Launcher.

If the error continues, submit a Player Support ticket and include your launcher logs so we can investigate. Refer to How do I gather logs for Epic Games Launcher?