Hi Epic Support has a articles about this
Why do I see IS-EO errors when using the Epic Games Launcher? - Epic Games Store Support
Uninstall EOS using Windows 11 and Reinstall the Epic Online Services (EOS), you can follow the steps from the article
IS-EO-FAILED_OP_START error in Epic Games Launcher - Epic Games Store Support
You can also whitelist EOS in your firewall. For additional information, you can also consult Firewall Considerations.
If you are using D: your PC must have the paths
D:\Program Files (x86)\Epic Games
D:\Program Files\Epic Games