can't login PBE sever

Since your message has zero additional context, here s some reading:

https://boards.pbe.leagueoflegends.com/en/c/bugs/LMnIU1Hn-unexpected-login-error-on-pbe https://support-leagueoflegends.riotgames.com/hc/en-us/articles/360043328413-Regionless-Accounts-League-of-Legends https://support-leagueoflegends.riotgames.com/hc/en-us/articles/360041542793-Is-My-League-Username-Globally-Unique-Check-if-It-Is-Here- https://boards.euw.leagueoflegends.com/en/c/bug-reports-eu/bitViigs-client-changed-the-region-and-language-without-me-selecting-it