"Sorry, we couldn't find that combination of username, password, and region"
what is that
only logged in pbe client , pbe community
not logged in this homepage
Post feedback on the PBE Community site (this site!) here.
Feedback regarding the PBE experience lives in the [General PBE Feedback subcommunity](http://community.pbe.leagueoflegends.com/c/general-pbe-feedback).