Defender's "IP Lockouts" page is not working

I am trying to setup the IP lockouts on my site to enable Country Blocking, but the IP Lockouts page is not loading any content.

And on the Defender’s dashboard, the “IP Lockouts” and the “Audit Logging” modules display a spinning icon all time.

I tried running a conflict test, but the issue is still there and there was no error logged after enabling WP_DEBUG.

But there are a couple of errors logged in the console: See chat.