"Suspicious connection blocked"?

Sara

At this moment I am barely typing through notifs interrupting me every 5 seconds.
It's been 2 hours like this, out of a sudden. I type from google chrome because not a single page in Opera (my
main browser) works. On each website I see "your connection to this site is not secure", the "DNS_PROBE_FINISHED_BAD_SECURE_CONFIG" error and bitdefender errors say "opera.exe tried to connect based on an untrusted certificate from security.cloudflare-dns.com. We blocked the connection to keep your data safe as untrusted certificates are issued by unrecognized certification bodies."
I have of course restarted my router, rebooted pc, restarted my IP, cleared dns cache... I have no idea what else to do to fix it. It's unbearable to work with.

JohnHolmes85

Mines been doing this also but with Chrome.

Suspicious connection blocked

2 minutes ago

Feature:

Online Threat Prevention

chrome.exe attempted to establish a connection relying on an untrusted certificate to dns.google. We blocked the connection to keep your data safe since untrusted certificates are issued by unrecognized Certificate Authorities.

It just pops up over and over until I add the exemption but it's hard to tell if it's a bad thing to add the exceptions.