Fail to apply NexT theme on Hexo

[kraken mini]

I am trying to use the v8.0.0 NexT theme on Hexo, but I got the following error when I use the command:

$ hexo clean

After I have done the instructions being posted on https://theme-next.js.org/docs/getting-started/#Enabling-NexT

I got this error:

ERROR {

  err: Error: Function yaml.safeLoad is removed in js-yaml 4. Use yaml.load instead, which is now safe by default.

What should I do to solve this?

Thanks!