Does not work anymore, not responding

[TianzeWang]

It looks like it no longer works today, don't know it's a problem from Google GCP or Cloudflare.

So this morning I found it no longer responds, but the status shows normal on both GCP and cloudflare. I tried registering a new account, it recovers for a while, but now it goes wrong again... Simply no responding.

Looking for some possible solutions here. Thanks.