Why did KuCoin shut down?

Could you please elaborate on the reasons behind KuCoin's shutdown? Was it due to a security breach, regulatory issues, or some other unforeseen circumstances? It's quite surprising to see a platform of such magnitude suddenly cease operations, and I'm curious to know the specifics behind this sudden move. Were there any warning signs that users should have been aware of? Additionally, what measures have been taken to ensure that users' funds and data are SAFE and secure during this time of uncertainty?