What does it mean: missing client parameter

[tbmsyearbook1]

What does this mean: missing client parameter? Happens when I try to login at the link.

[konrad.sopala]

Hey there!

We definitely need more context to help you troubleshoot that. Thanks!

[cfstartgrid]

@konrad.sopala: so I am getting the same error “missing client parameter” when I am trying to connect MS Azure SAML2 application through a SAML2 connection on Auth0 side. Yes, I know Auth0 has a special kind of connection for MS Azure AD but I am testing SAML2 here. For example I was able to connect get MS Azure to login into Amazon Cognito using SAML2. Now I am testing the same with Auth0.

More specifically, here’s what I am doing

1. Created a SAML2 enterprise connection on Auth0 side:
   
2. Created a SAML2 enterprise application on MS Azure side:
   
3. Downloaded certificate from MS Azure app in #2 and uploaded it to Auth0 SAML connection in #1, configured other properties of that connection to get it talk to MS Azure
4. Configured properties of MS Azure app in #2 to get it talk to Auth0 connection
5. Then I go to MS Azure and press “Test” button
6. After authentication of my user on MS Azure side, it threw me to an error page on Auth0 side:
   
7. Looking into Auth0 Logs I am seeing this error message:

{
  "date": "2020-05-27T18:10:57.275Z",
  "type": "f",
  "description": "missing client parameter",
  "connection_id": "",
  "ip": "73.202.58.233",
  "user_agent": "Chrome 83.0.4103 / Mac OS X 10.15.4",
  "details": {
    "body": {},
    "qs": {},
    "error": {
      "message": "missing client parameter",
      "oauthError": "invalid_request",
      "type": "request-error"
    },
    "session_id": "SBCuSOERmbze2oGmH4ur4QcSbKff220J"
  },
  "hostname": "dev-ezm3mejc.auth0.com",
  "log_id": "90020200527181057906000044976491624196590534818537668690",
  "_id": "90020200527181057906000044976491624196590534818537668690",
  "isMobile": false
}

How do I fix this?
Is this about mapping of MS Azure attributes to Auth0 ones?
Can you help?
I already searched other discussions about “missing client parameter”, didn’t find anything useful or recent.

Please help!