The realm I was playing on is no longer giving me or anyone else on the realm an issue, but for what it's worth to answer one of the mods earlier in the thread, I did not have a Windows update the day mine crashed.
I certainly hope those holding subscriptions are going to be reimbursed for the days without service.
Is this even on their radar or being worked on? Would be nice to have some sort of response.
Also having this issue since last night.
Well, yesterday everyone on the realm was able to log in again and now it's crashing again, and this is after restarting the launcher and downloading the "fix."
Edit: I also just tried uninstalling and reinstalling. Did not help.