Okay, so this happened:
I had the PBE Client open and was waiting for the servers to be online. I wasn't paying attention to the client at that time. I saw that they were online and I signed in to jump into a normal blind pick. Looked into the store but it wasn't loading for me. Everything went fine until the game was supposed to start. I got the black screen a couple of times and restarted the client. After that, it needed to download an update.
I don't know if it just had another update or if the client didn't download the update at all since I didn't check if the client updated properly before logging in.
After the restart and login, I could play as normal. The game finished but I didn't get a scoring on the rank. As I am typing, the circly thing is still going around.
Yep, just wanted to report that.