Gamebreaking bug (for Mac users?) - black screen after champ select

For the last two days, I can't play league at all on both of my Mac computers.

I tried on both my older Mac and my new Macbook (both have OS Catalina installed) & the same where I was completely unable to play both Ranked, Normal, and even TFT games.

Here's what I did to produce the error:

1. Queue in game
2. Entered champ select & chose champ
3. Instead of load in screen, I got a black screen
4. Even with turning my computer off, restarting etc. the issue happened 3 times in a row
5. I get AFK penalty and lose LP

When I tried on my other Mac computer, almost the same thing happened (I got a frozen image of the start screen rather than a black screen).

Riot, please fix this bug for Mac users.