`Unknown Error: Http failure response for https://localhost:5001/.well-known/openid-configuration: 0 Unknown Error`

[carloswm85]

I run the Server project and Angular client.

When sending a request from the client to the server I get:

[14:46:15 INF ] Starting web host
info: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[63]
      User profile is available. Using 'C:\Users\carlo\AppData\Local\ASP.NET\DataProtection-Keys' as key repository and Windows DPAPI to encrypt keys at rest.
info: Microsoft.EntityFrameworkCore.Migrations[20411]
      Acquiring an exclusive lock for migration application. See https://aka.ms/efcore-docs-migrations-lock for more information if this takes too long.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (14ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsLock' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (6ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      INSERT OR IGNORE INTO "__EFMigrationsLock"("Id", "Timestamp") VALUES(1, '2025-10-20 17:46:17.500877+00:00');
      SELECT changes();
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (1ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      CREATE TABLE IF NOT EXISTS "__EFMigrationsHistory" (
          "MigrationId" TEXT NOT NULL CONSTRAINT "PK___EFMigrationsHistory" PRIMARY KEY,
          "ProductVersion" TEXT NOT NULL
      );
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsHistory' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (2ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT "MigrationId", "ProductVersion"
      FROM "__EFMigrationsHistory"
      ORDER BY "MigrationId";
info: Microsoft.EntityFrameworkCore.Migrations[20405]
      No migrations were applied. The database is already up to date.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (3ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      DELETE FROM "__EFMigrationsLock";
info: Microsoft.EntityFrameworkCore.Migrations[20411]
      Acquiring an exclusive lock for migration application. See https://aka.ms/efcore-docs-migrations-lock for more information if this takes too long.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsLock' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (2ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      INSERT OR IGNORE INTO "__EFMigrationsLock"("Id", "Timestamp") VALUES(1, '2025-10-20 17:46:17.7658743+00:00');
      SELECT changes();
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      CREATE TABLE IF NOT EXISTS "__EFMigrationsHistory" (
          "MigrationId" TEXT NOT NULL CONSTRAINT "PK___EFMigrationsHistory" PRIMARY KEY,
          "ProductVersion" TEXT NOT NULL
      );
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsHistory' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT "MigrationId", "ProductVersion"
      FROM "__EFMigrationsHistory"
      ORDER BY "MigrationId";
info: Microsoft.EntityFrameworkCore.Migrations[20405]
      No migrations were applied. The database is already up to date.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (1ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      DELETE FROM "__EFMigrationsLock";
info: Microsoft.EntityFrameworkCore.Migrations[20411]
      Acquiring an exclusive lock for migration application. See https://aka.ms/efcore-docs-migrations-lock for more information if this takes too long.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsLock' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (1ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      INSERT OR IGNORE INTO "__EFMigrationsLock"("Id", "Timestamp") VALUES(1, '2025-10-20 17:46:17.8605772+00:00');
      SELECT changes();
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      CREATE TABLE IF NOT EXISTS "__EFMigrationsHistory" (
          "MigrationId" TEXT NOT NULL CONSTRAINT "PK___EFMigrationsHistory" PRIMARY KEY,
          "ProductVersion" TEXT NOT NULL
      );
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT COUNT(*) FROM "sqlite_master" WHERE "name" = '__EFMigrationsHistory' AND "type" = 'table';
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      SELECT "MigrationId", "ProductVersion"
      FROM "__EFMigrationsHistory"
      ORDER BY "MigrationId";
info: Microsoft.EntityFrameworkCore.Migrations[20405]
      No migrations were applied. The database is already up to date.
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (2ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
      DELETE FROM "__EFMigrationsLock";
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (3ms) [Parameters=[@__identifier_0='?' (Size = 10)], CommandType='Text', CommandTimeout='30']
      SELECT "o"."Id", "o"."ApplicationType", "o"."ClientId", "o"."ClientSecret", "o"."ClientType", "o"."ConcurrencyToken", "o"."ConsentType", "o"."DisplayName", "o"."DisplayNames", "o"."JsonWebKeySet", "o"."Permissions", "o"."PostLogoutRedirectUris", "o"."Properties", "o"."RedirectUris", "o"."Requirements", "o"."Settings"
      FROM "OpenIddictApplications" AS "o"
      WHERE "o"."ClientId" = @__identifier_0
      LIMIT 1
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[@__identifier_0='?' (Size = 11)], CommandType='Text', CommandTimeout='30']
      SELECT "o"."Id", "o"."ApplicationType", "o"."ClientId", "o"."ClientSecret", "o"."ClientType", "o"."ConcurrencyToken", "o"."ConsentType", "o"."DisplayName", "o"."DisplayNames", "o"."JsonWebKeySet", "o"."Permissions", "o"."PostLogoutRedirectUris", "o"."Properties", "o"."RedirectUris", "o"."Requirements", "o"."Settings"
      FROM "OpenIddictApplications" AS "o"
      WHERE "o"."ClientId" = @__identifier_0
      LIMIT 1
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[@__name_0='?' (Size = 12)], CommandType='Text', CommandTimeout='30']
      SELECT "o"."Id", "o"."ConcurrencyToken", "o"."Description", "o"."Descriptions", "o"."DisplayName", "o"."DisplayNames", "o"."Name", "o"."Properties", "o"."Resources"
      FROM "OpenIddictScopes" AS "o"
      WHERE "o"."Name" = @__name_0
      LIMIT 1
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[@__name_0='?' (Size = 9)], CommandType='Text', CommandTimeout='30']
      SELECT "o"."Id", "o"."ConcurrencyToken", "o"."Description", "o"."Descriptions", "o"."DisplayName", "o"."DisplayNames", "o"."Name", "o"."Properties", "o"."Resources"
      FROM "OpenIddictScopes" AS "o"
      WHERE "o"."Name" = @__name_0
      LIMIT 1
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[@__normalizedName_0='?' (Size = 13)], CommandType='Text', CommandTimeout='30']
      SELECT "a"."Id", "a"."ConcurrencyStamp", "a"."Name", "a"."NormalizedName"
      FROM "AspNetRoles" AS "a"
      WHERE "a"."NormalizedName" = @__normalizedName_0
      LIMIT 1
info: Microsoft.EntityFrameworkCore.Database.Command[20101]
      Executed DbCommand (0ms) [Parameters=[@__normalizedUserName_0='?' (Size = 20)], CommandType='Text', CommandTimeout='30']
      SELECT "a"."Id", "a"."AccessFailedCount", "a"."ConcurrencyStamp", "a"."Email", "a"."EmailConfirmed", "a"."LockoutEnabled", "a"."LockoutEnd", "a"."NormalizedEmail", "a"."NormalizedUserName", "a"."PasswordHash", "a"."PhoneNumber", "a"."PhoneNumberConfirmed", "a"."SecurityStamp", "a"."TwoFactorEnabled", "a"."UserName"
      FROM "AspNetUsers" AS "a"
      WHERE "a"."NormalizedUserName" = @__normalizedUserName_0
      LIMIT 1
info: Quartz.Core.SchedulerSignalerImpl[0]
      Initialized Scheduler Signaller of type: Quartz.Core.SchedulerSignalerImpl
info: Quartz.Core.QuartzScheduler[0]
      Quartz Scheduler created
info: Quartz.Core.QuartzScheduler[0]
      JobFactory set to: Quartz.Simpl.MicrosoftDependencyInjectionJobFactory
info: Quartz.Simpl.RAMJobStore[0]
      RAMJobStore initialized.
info: Quartz.Impl.StdSchedulerFactory[0]
      Quartz Scheduler 3.15.0.0 - 'QuartzScheduler' with instanceId 'NON_CLUSTERED' initialized
info: Quartz.Impl.StdSchedulerFactory[0]
      Using thread pool 'Quartz.Simpl.DefaultThreadPool', size: 10
info: Quartz.Impl.StdSchedulerFactory[0]
      Using job store 'Quartz.Simpl.RAMJobStore', supports persistence: False, clustered: False
[14:46:18 INF Quartz.ContainerConfigurationProcessor] Adding 1 jobs, 1 triggers.
[14:46:18 INF Quartz.ContainerConfigurationProcessor] Adding job: OpenIddict/Quartz.NET integration.OpenIddict job
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: https://localhost:5001
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: http://localhost:5000
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
      Content root path: C:\Users\carlo\source\repos\practice\openiddict-ui\samples\Server
info: Quartz.Core.QuartzScheduler[0]
      Scheduler QuartzScheduler_$_NON_CLUSTERED started.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/2 GET https://localhost:5001/.well-known/openid-configuration - - -
info: OpenIddict.Server.OpenIddictServerDispatcher[6053]
      The request URI matched a server endpoint: Configuration.
info: OpenIddict.Server.OpenIddictServerDispatcher[6066]
      The configuration request was successfully extracted: {}.
info: OpenIddict.Server.OpenIddictServerDispatcher[6067]
      The configuration request was successfully validated.
info: OpenIddict.Server.OpenIddictServerDispatcher[6142]
      The response was successfully returned as a JSON document: {
        "issuer": "https://localhost:5001/",
        "authorization_endpoint": "https://localhost:5001/connect/authorize",
        "token_endpoint": "https://localhost:5001/connect/token",
        "introspection_endpoint": "https://localhost:5001/connect/introspect",
        "end_session_endpoint": "https://localhost:5001/connect/logout",
        "userinfo_endpoint": "https://localhost:5001/connect/userinfo",
        "jwks_uri": "https://localhost:5001/.well-known/jwks",
        "grant_types_supported": [
          "authorization_code",
          "refresh_token",
          "client_credentials"
        ],
        "response_types_supported": [
          "code"
        ],
        "response_modes_supported": [
          "query",
          "form_post",
          "fragment"
        ],
        "scopes_supported": [
          "openid",
          "offline_access",
          "email",
          "profile",
          "roles",
          "server_scope",
          "api_scope"
        ],
        "claims_supported": [
          "aud",
          "exp",
          "iat",
          "iss",
          "sub"
        ],
        "id_token_signing_alg_values_supported": [
          "RS256"
        ],
        "code_challenge_methods_supported": [
          "plain",
          "S256"
        ],
        "subject_types_supported": [
          "public"
        ],
        "prompt_values_supported": [
          "consent",
          "login",
          "none",
          "select_account"
        ],
        "token_endpoint_auth_methods_supported": [
          "client_secret_post",
          "private_key_jwt",
          "client_secret_basic"
        ],
        "introspection_endpoint_auth_methods_supported": [
          "client_secret_post",
          "private_key_jwt",
          "client_secret_basic"
        ],
        "require_pushed_authorization_requests": false,
        "claims_parameter_supported": false,
        "request_parameter_supported": false,
        "request_uri_parameter_supported": false,
        "tls_client_certificate_bound_access_tokens": false,
        "authorization_response_iss_parameter_supported": true
      }.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/2 GET https://localhost:5001/.well-known/openid-configuration - 200 1787 application/json;charset=UTF-8 182.8582ms

And in the client I can read:

Unknown Error: Http failure response for https://localhost:5001/.well-known/openid-configuration: 0 Unknown Error

This is the client build outcome:

> npm run start
npm WARN config global `--global`, `--local` are deprecated. Use `--location=global` instead.

> clientapp@0.0.0 start
> ng serve --proxy-config proxy.conf.js

Node.js version v17.9.1 detected.
Odd numbered Node.js versions will not enter LTS status and should not be used for production. For more information, please see https://nodejs.org/en/about/releases/.
✔ Browser application bundle generation complete.

Initial Chunk Files   | Names         |  Raw Size
vendor.js             | vendor        |   2.91 MB | 
polyfills.js          | polyfills     |   1.14 MB | 
main.js               | main          | 434.41 kB | 
styles.css, styles.js | styles        | 260.32 kB | 
runtime.js            | runtime       |   6.52 kB | 

                      | Initial Total |   4.74 MB

Build at: 2025-10-20T17:50:05.919Z - Hash: a2ae309b8f9a2edf - Time: 9767ms

Warning: C:\Users\carlo\source\repos\practice\openiddict-ui\samples\Client\node_modules\angular-oauth2-oidc\fesm2020\angular-oauth2-oidc.mjs depends on 'fast-sha256'. CommonJS or AMD dependencies can cause optimization bailouts.
For more info see: https://angular.io/guide/build#configuring-commonjs-dependencies



** Angular Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200/ **


√ Compiled successfully.

Can you help me to find out what I am doing wrong?

[carloswm85]

Asking to the AI, I found a possible solution:

https://claude.ai/share/8911b40a-0aec-4345-9779-d482f50c1c10

It's a CORS problem. I will test this solution later this week, and let you know if it does not work.