Just a little update...
The message showed up again, so I spoke with Cloudflare to see why they had flagged my site. I whitelisted my IP on my Cloudflare firewall configuration and they referred me to The Project Honeypot, they were the ones that had flagged my site as spammer because someone had used my IP to spam
I told them my site was legit and asked them to remove me from their list
So far so well, I see no errors on the plugin updates page and the broken links checker is working again