App sending request to and I don't know why

After successful build of the Angular app, UI of the app is loaded on the deploy preview but in the console I see this error:

Access to resource at '' from origin '' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'.

I am trying to understand where is this request to coming from. Nothing in my app uses ably, at least not that I am aware of.

First, the app sends this request:

And then the request to ably that in Network tab seems like it fails, but the status code is 200. :thinking:

Deploy preview:

Can somebody point me in the right directions?

As a guess, probably something to do with the Netlify Drawer that shows on the deploy previews


@dig Looks like a safe guess to me.

The URL is in the response of the call.