Some new LoL users are unable to create a LoL player profile and get the message "Username cannot be found on Riot's servers. Please check your username and try again."
This error for new LoL users on our platform can occur for several reasons:
First, check if you have specified your server region correctly.
In the first picture, you can see that the server region is incorrect:
Immediately after you change to the correct server region, you will be able to continue the registration process.
2)The second reason for this error may be that the issue is on Riot's server side.
Please wait and try to go through the registration process at a later time.
If nothing helps, please Submit a request to our Support team, and we will be happy to help you resolve the issue!