Can't access Legends of Runeterra any more?

I've been playing Legends of Runeterra for the last week or so (since release), but when I went to login today, it said I don't have access to it. Did something happen that I don't know about?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

Report as:
Offensive Spam Harassment Incorrect Board