You can try the following,
Do you have any VPN software installed on your PC? If so, please completely remove it, and reinstall Engine from here:
Once you have reinstalled Engine, you can now try to install your VPN software however, it may cause the issue to emerge again.
You can also try the following,
Can you please try to fully re-install SteelSeries GG?
1. Uninstall via your control panel --> Add/remove programs. Restart PC.
2. Delete old downloaded installer file.
Please let me know if the issue continues.
3. Re-download the Engine from this link: Click here
If you need visual help there is a video shown below!
For more How-To videos, FAQs and help, click HERE.