Subtitles
noun
A curtain of letters that goes on your screen are subtitles. Sometimes they have black bar backgrounds too, which are like curtains!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
字幕のせいで気が散ることもあります。
Subtitles can be a distraction.
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.