Chain
Chaining, Connection
noun, verbal noun
If you take along a chain with you it's still a chain, it's just moving somewhere new.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
まずはこの負の連鎖を断ち切る必要があります。
First, there's a need to break this vicious chain of unfortunate events.
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.