Sign In fails when using Firebase's OIDC authentication

[douglas97]

We are developing an app in which we are trying to use Firebase's Authentication with a custom OIDC provider, but we are facing some errors when trying to sign in.

We have already followed the steps described in this guide: https://firebase.google.com/docs/auth/web/openid-connect

However, when we try to sign in, we receive the following error:

{
   "error": {
      "code": 400,
      "message": "INVALID_IDP_RESPONSE : Error connecting to the given credential's issuer.",
      "errors": [
         {
            "message": "INVALID_IDP_RESPONSE : Error connecting to the given credential's issuer.",
            "domain": "global",
            "reason": "invalid"
         }
      ]
   }
}

We have also tried to follow the troubleshooting guide available below, but none of the checks we executed indicated a problem.

https://cloud.google.com/iam/docs/troubleshooting-workforce-identity-federation#oidc_sign-in_errors

Glad if anyone could help us!

[shaaland]

Hi @douglas97 ,

It looks like you are creating your app using code?  You will get the best help in one of the Firebase communities linked here.  We focus on Google Cloud's iPaaS product called Application Integration here, so we probably won't be super helpful to you. If you are using Application Integration and are hitting this error, please correct me and we can get the right expert to help out. 

Thanks,

Scott