Due to a Riot outage (the spectator system) in some regions (KR), live games data are currently unavailable on the website for those regions. The app is unaffected though. Sorry for the inconvenience

Porofessor App Support

I start a replay/live game and it stays on a black screen / it doesn't start

Please make sure your LoL installation is up to date. If you have multiple LoL installations on your PC, please make sure that all of them are up to date.