The SAML 2 connection endpoint generates an issuer error

What is the name of the domain?

What is the error message?

SAML Verify: Invalid SAML response, SAML Validation: empty issuer. “none”

What is the issue you’re encountering

The SAML 2 connection endpoint generates an issuer error.

What steps have you taken to resolve the issue?

Hello,

We are trying to configure SAML as authentication for zero trust.

The reception of the AuthnRequest works correctly, but when our IDP sends the SAML response to the Cloudflare endpoint, we get the following error: SAML Verify: Invalid SAML response, SAML Validation: empty issuer. “none”

However, when we analyze the request, the issuer is clearly present and matches the one configured in the interface.

Does anyone have an idea?

Thanks in advance.

Screenshot of the error