Can't validate SSL Certificate. Either it is self-signed (which will cause browser warnings) or it i

[anon41653018]

Can’t validate SSL Certificate. Either it is self-signed (which will cause browser warnings) or it is invalid.

Free SSL seems invalid and facebook does not accept it.

[KangJL]

@anon41653018

Free SSL seems invalid and facebook does not accept it.

Likely due to this

SSL checker shows "certificate not trusted" warning

When you check your InfinityFree SSL certificate with online SSL checker tools, you might see a warning like this: The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. This warning sounds scary, but it’s actually not a problem for your website visitors. What this warning means for your site You can safely ignore this warning. Your site will work perfectly fine with HTTPS for virtually all mode…

[SpookyKipper]

KangJl should be correct, the chain is missing, which is not supported in Free Hosting

Two Solutions:

1. Upgrade to Premium
2. If you have a custom domain, use Cloudflare.