Hi mccourgette,
I’m sorry for the delay. We’re still looking into the issue for you. Could you please try the following (if possible):
- Uninstall the launcher through control panel.
- Open a Command Prompt window via the Power User Menu -hold the WIN and X keys down together, or right-click on the Start button, and choose Command Prompt.
- At the command prompt, type: ipconfig /flushdns
- Reboot your system.
- Reinstall launcher using the latest version available from the Unreal Engine website.
If you are not able to or do not wish to uninstall the launcher because you are using the editor in offline mode, then just try flushing the DNS and reboot.