Error while reaching to render.com

Cant reach render.com and my static website. Is there anyone to facing same problem?

The error code I see in Chrome ERR_HTTP2_INADEQUATE_TRANSPORT_SECURITY

The subdomains are working fine. But domain doesnt work like https://render.com. When I try to go www. it redirecting to domain directly.

@jova Does the issue persist on other browsers or connecting from a different network? Are you by chance using a vpn?