How to Fix League of Legends RADS ERROR in Windows 10/8. How to Fix League of Legends RADS ERROR in Windows 10/8. How to Fix League of Legends RADS ERROR in Windows 10/8. RADS Error could not connect to the HTTP server. Please check that your internet connection is enabled and that your firewall is not blocking access". |--| fix. RADS Error could not connect to the HTTP server. Please check that your internet connection is enabled and that your firewall is not blocking access". |--| fix.