[Champion select] [Odyssey (Cadet)]: Cannot select champion!

I went into my collection to edit the augments for Yasuo. After saving the augments setup, I went into the lobby and pressed Play button. A match was found, I pressed the accept button and immediately got an error screen, then my champion roster loaded empty. I let the time run out in hope for a random champion to be selected automatically, but now I have a leave penalty of 5 minutes.