403 forbidden error when visiting website

The website uses Cloudflare for SSL but it gives 403 forbidden error.

How to fix: login Cloudflare and click Crypto, for SSL, change Flixable to Full.


The FlexibleSSL option allows a secure HTTPS connection between your visitor and Cloudflare, but forces Cloudflare to connect to your origin web server over unencrypted HTTP. An SSL certificate is not required on your origin web server and your visitors will still see the site as being HTTPS enabled.

Full ensures a secure connection between both the visitor and your Cloudflare domain and between Cloudflare and your web server.The FullSSL option does not validate SSL certificate authenticity at the origin. A self-signed certificate is allowed at the origin web server.