The error message "Authentication failed. Check whether the authentication information is correct, and try again" appears when I try to set up the Wireless LAN setting.
Use a different character according to the specification of the RADIUS server.
Examples of RADIUS server limitation:
- Windows Server 2008 R2 NPS (Network Policy Server):
A user ID or password that contains a multibyte character.
- FREE RADIUS (Linux / Windows):
A user ID or password that contains "\"