Hi, any clue why this happen? I don't see any logs related to this. Server just keep responding with 400, in most pages.

What does the response show.

Ops, sorry my bad. The root of issue is actually us. We changed our nginx configuration with a trick, so if signoz upstream network is down it wouldn't affect our nginx, to also go down. But for some reason, it doesn't translate query variables correctly. For some reason the response's text was not being showed in browser.