Error code
Riot A critical error has occurred
RIOTA critical error has occurred
Game/Platform Error· An error code shown by a game or gaming platform/launcher.
What it means
A critical error prevents you from logging into League.
How to fix it
- Close overlay apps such as Steam Origin or Discord.
- open your local Riot Games League of Legends folder.
- delete the config and data folders.
- relaunch.
Not affiliated with Riot. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More Riot codes
- Error 1BCannot log in due to an ISP connection problem
- Error 7Riot servers are overloaded
- Error Code 002The League client failed to patch and you cannot log in
- Error Code 004The League client failed to patch and shuts down requiring a restart
- Under maintenance errorThe League client cannot receive updates
- Unexpected Error With Login SessionA stuck League client instance blocks a new login
- Unknown DirectX errorA DirectX error prevents the League client from launching
- VAL 0VALORANT hit a connection error talking to Riot services
- VAL 1VALORANT hit a connection error talking to Riot services
- VAL 152Hardware ID ban
- VAL 19There is a problem with the Riot Client
- VAL 29A network issue is blocking VALORANT