Error - net::err_cert_authority_invalid

When I am trying to access my website through the company laptop, I am getting NET::ERR_CERT_AUTHORITY_INVALID. I have 2 websites and one is working fine and another is not working. Both are connected to Cloudflare. Can anyone please suggest how to fix it? If there is an option that I have missed in Cloudflare then please let me know.

It sounds like you have either a Cloudflare origin cert on the server, or some other self-signed certificate. And that laptop is connecting directly to the server due to a local hosts file, or outdated DNS.

What’s the domain?

https://www.a2zonlinedeals.com/

It looks good to me:

Yes, Sometime its working sometime not

I am trying to open this my company laptop then it’s showing above error. I am not sure why?