Correct
You're lost, but you've come across a signpost that says "correct" in all directions. "Correct," "correct," "correct," it says. No matter which way you go, it's the correct way! What a relief!
You could also use the mnemonic you learned with the kanji: There is a line on the ground so you stop, making a giant sign pop up that says CORRECT! You obeyed the rules of the road and did the correct thing. Good on you.
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.