Since yesterday the link to start a Blackout game has been missing.

Using latest version of Chrome, Windows 10

Yes it's still missing. I've tried different browsers. I'm using a Windows 10 computer. It doesn't show up on an iPhone either, though. I have Adblock disabled on Subeta.

However, I've noticed that it appears when I am LOGGED OUT. Once I log in, it completely disappears.

Where is it disappearing from? What page?

https://subeta.net/games/blackout.php?act=play Is that what you mean...?

The game should be active already when you are on that page. Does it say something like 'You have made 0 moves!'?

What about this link? https://subeta.net/games/blackout.php

No, it's completely blank. When I go to that link, it automatically adds "?act=play" to the end.