unexplained Client authentication failed error

The /token endpoint is responding with 401.

The client has the grant type of password
The security access control and firewalls are configured as per the documentation
The public and private key's have been generated
The password is correct

Stack

Symfony 5.3
php 8.0.1
api-platform 2.6
trikoder/oauth2-bundle 3.2

Response:

{
    "error": "invalid_client",
    "error_description": "Client authentication failed",
    "message": "Client authentication failed"
}

Request body details:

grant_type: password client_id: 5b810fc66e1b142ac324b123c82eb581, client_secret: aeb94068f1b703bed82cc21e48ffc4e9105d69df4cb68ff62b168e33e550706ba4c299e938e500164225e64f50f27f7f15ef893f3c2a2a493f59b35f386bc2d5 username: role_super_admin@fixture.com password: 12345678

Log output:

[2021-11-01T18:19:56.716107+01:00] php.INFO: User Deprecated: Since symfony/security-bundle 5.3: The "security.authentication.manager" service is deprecated, use the new authenticator system instead. {"exception":"[object] (ErrorException(code: 0): User Deprecated: Since symfony/security-bundle 5.3: The \"security.authentication.manager\" service is deprecated, use the new authenticator system instead. at /var/www/code/var/cache/dev/ContainerW9AsxaO/getSecurity_Authentication_ManagerService.php:22)"} []
[2021-11-01T18:19:56.735584+01:00] php.INFO: User Deprecated: Since symfony/security-core 5.3: The "Symfony\Component\Security\Core\Authentication\AuthenticationProviderManager" class is deprecated, use the new authenticator system instead. {"exception":"[object] (ErrorException(code: 0): User Deprecated: Since symfony/security-core 5.3: The \"Symfony\\Component\\Security\\Core\\Authentication\\AuthenticationProviderManager\" class is deprecated, use the new authenticator system instead. at /var/www/code/vendor/symfony/security-core/Authentication/AuthenticationProviderManager.php:27)"} []
[2021-11-01T18:19:56.736688+01:00] php.INFO: User Deprecated: Since symfony/security-core 5.3: The "Symfony\Component\Security\Core\Event\AuthenticationFailureEvent" class is deprecated, use "Symfony\Component\Security\Http\Event\LoginFailureEvent" with the new authenticator system instead. {"exception":"[object] (ErrorException(code: 0): User Deprecated: Since symfony/security-core 5.3: The \"Symfony\\Component\\Security\\Core\\Event\\AuthenticationFailureEvent\" class is deprecated, use \"Symfony\\Component\\Security\\Http\\Event\\LoginFailureEvent\" with the new authenticator system instead. at /var/www/code/vendor/symfony/security-core/Event/AuthenticationFailureEvent.php:18)"} []
[2021-11-01T18:19:56.883198+01:00] request.INFO: Matched route "oauth2_token". {"route":"oauth2_token","route_parameters":{"_route":"oauth2_token","_controller":"Trikoder\\Bundle\\OAuth2Bundle\\Controller\\TokenController::indexAction"},"request_uri":"http://localhost:8080/token","method":"POST"} []
[2021-11-01T18:19:57.533603+01:00] doctrine.DEBUG: SELECT t0.secret AS secret_1, t0.redirect_uris AS redirect_uris_2, t0.grants AS grants_3, t0.scopes AS scopes_4, t0.active AS active_5, t0.allow_plain_text_pkce AS allow_plain_text_pkce_6, t0.identifier AS identifier_7 FROM oauth2_client t0 WHERE t0.identifier = ? ["5b810fc66e1b142ac324b123c82eb581"] []

config/packages/trikoder_oauth2.php

<?php

declare(strict_types=1);

use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->extension('trikoder_oauth2', [
        'authorization_server' => [
            'private_key' => __DIR__ . '/../../var/oauth/private.key',
            'private_key_passphrase' => null,
            'encryption_key' => '%env(string:OAUTH2_ENCRYPTION_KEY)%',
            'grant_types' => [
                'authorization_code' => [
                    'enable' => true
                ],
                'client_credentials' => [
                    'enable' => true
                ],
                'implicit' => [
                    'enable' => true
                ],
                'password' => [
                    'enable' => true
                ],
                'refresh_token' => [
                    'enable' => true
                ],
            ],
        ],
        'resource_server' => [
            'public_key' => __DIR__ . '/../../var/oauth/public.key',
        ],
        'persistence' => [
            'doctrine' => null,
        ],
    ]);
};

trikoder / oauth2-bundle

unexplained Client authentication failed error #297