SSO settings issues

Hi!

We are trying to configure SSO via Cloudflare ZeroTrust on n8n, but the following error occurs:

SAML Authentication failed. Invalid SAML response (missing attributes: http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress, http://schemas.xmlsoap.org/ws/2005/05/identity/claims/upn, http://schemas.xmlsoap.org/ws/2005/05/identity/claims/firstname, http://schemas.xmlsoap.org/ws/2005/05/identity/claims/lastname).

We use Google Workspace internally at Cloudflare, so the attributes were created in Google Workspace, but the errors persist. I also created them in ZeroTrust, but even applying the attributes in the header, the error persists.

Is there a procedure for how this should be done?