Hello, recently I bought new domain and made a new site, but when I tried to post link on Facebook, I got an error: A link you're sharing might not be secure It looks like this link is unsecure: Body of an error/warning message. Title is: A link you're sharing might not be secureTo protect your account, we recommend not posting the link. If you want to share it anyway, you'll need to complete this security check. Does it mean this domain is banned on Facebook by the previous owner? Can I do something to make this link secure again?
I don't think your domain is banned by Facebook, as you said you bought a new domain so, I think you should check the security issues in your website first and then try to post it again on FB.
I am not sure, but I think no. Their system just wants to prevent spam and doing that automatically. However, I do not know how to resolve that issues because I have never heard of the similar problem before. Still, you should contact the Facebook staff and explain it to them.