Client Errors (Selecting Roles and Creating Lobbies)

I had just patched today, and I am having a lot of issues trying to get in-game from either an error when making my lobby or simply selecting my role. I managed to get around it by selecting my main role, hitting OK on the error, and then remaking the lobby (the role was "pre-selected" by me doing this); however, this is still very annoying to deal with before every game. Anyone know what has happened? (Looking at you Rito :P)