How to configure Cloudflare Zero Trust SAML to wp-saml-auth? I'm having trouble.

[chiyi4488]

Here is my configuration information, I followed the information given to me on the Cloudflare website and typed in wp-saml-auth but the login still failed.

I suspect it is a certificate issue as Cloudflare only provides me with a public key, not a certificate.

What can I do to solve this situation?
I sincerely hope I can get a reply.

Cloudflare SaaS applications docs: https://developers.cloudflare.com/cloudflare-one/applications/configure-apps/saas-apps

P.S. I use GitHub OAuth as Cloudflare SaaS applications Providers