The browser detected a potential security threat and did not continue to self-signed.badssl.com. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details.
What can you do about it?
You can continue with your default DNS resolver. However, a third-party might be able to see what websites you visit.
It looks like your network security settings might be causing this. Do you want the default settings to be restored?