Just received an email from the Club Penguin Island support team confirming that whilst there are problems logging in, it’ll be fixed when “more space is available on the island”, essentially meaning that the worlds/servers are all full.
This is kind of confusing as people have shared that most worlds are empty. Don’t worry though as the development team are on it! It’s interesting to note that staff can log on though! Some friends lists also say that people who aren’t on are on as Yovas confirmed.
Overall, I guess we’ll just need to wait, but at least we now know why! Thanks for reading!