Cloudflare SSL certificate issue

I m facing one issue in cloudflare SSL. I tried to enable SSL in Flexible mode and it’s working quite fine but it’s showing host error in Full or Full (Strict) mode so can anybody help me to resolve this?

What error You’ve? When use Full, then You’ve to install SSL on Your server side.

You’ll need to enable Full strict Mode. However ensure letsencrypt cert was successfully implemented. Also post installation, give your server a restart.