Fosuserbundle: Authentication request could not be processed due to a system problem.

[ghost]

Symfony FOSUserBundle versions: v2.0.2
Symfony version: 3.4
Symfony Flex: yes

Description of the problem including expected versus actual behavior:
Users cannot login when using correct credentials. The login form will give following error: "Authentication request could not be processed due to a system problem.". Cannot find any errors in the command prompt of the server. Also the log files are empty.

Steps to reproduce:

1. Install Symfony 3.4 with Symfony Flex
2. Configure FosUserBundle like the config from 3.3
3. Try to login

The config/packages/fos_user.yaml file looks like:

fos_user:
    db_driver: orm # other valid values are 'mongodb', 'couchdb' and 'propel'
    firewall_name: main
    user_class: App\Entity\User
    from_email: # Use this node only if you don't want the global email address for the confirmation email
                address:        [email protected]
                sender_name:    Webmaster JimmyD

    registration:
        confirmation:
            from_email: # Use this node only if you don't want the global email address for the confirmation email
                address:        [email protected]
                sender_name:    Webmaster 
            enabled:    true # change to true for required email confirmation
            template:   FOSUserBundle:Registration:email.txt.twig

The config/routes.yaml looks like:

fos_user:
    resource: "@FOSUserBundle/Resources/config/routing/all.xml"

And the config/packages/security.yaml looks like:

security:
    providers:
        in_memory: { memory: ~ }
        fos_userbundle:
            id: fos_user.user_provider.username_email
    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt)|css|images|js)/
            security: false
        main:
            anonymous: ~

            # activate different ways to authenticate
            pattern: ^/
            form_login:
                check_path: /login_check
                login_path: /login
                provider: fos_userbundle
                always_use_default_target_path: true
                default_target_path: /user/home
            logout:
                path: /logout
                target: /login

            anonymous:    true

    encoders:
        FOS\UserBundle\Model\UserInterface: bcrypt

    role_hierarchy:
        ROLE_USER:       ROLE_USER
        ROLE_ADMIN:     [ROLE_USER, ROLE_ADMIN, ROLE_ALLOWED_TO_SWITCH]

    access_control:
        - { path: ^/login$, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/register, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/resetting, role: IS_AUTHENTICATED_ANONYMOUSLY }
        - { path: ^/admin/, role: ROLE_ADMIN }
        - { path: ^/user/, role: ROLE_USER }
        - { path: ^/profile/, role: ROLE_USER }
        - { path: ^/, role: IS_AUTHENTICATED_ANONYMOUSLY }

[jimmyd-be]

I have the same issue with Fosuserbundle in a Symfony Flex environment. Tried everything and I'm getting the same not explaning error. Also my logs are empty.

[jimmyd-be]

After debugging and checking the Fos errors in debug I found the issue. My User entity was not correct.

[Dev-Int]

Symfony FOSUserBundle versions: v2.1
Symfony version: 4.1
Symfony Flex: yes

I have same issue, and no log too...

[niketpathak]

Do not forget to check your /var/log/dev.log to check for errors since this error is a very generic one. The dev.log will provide you more details

[giansalex]

check your connectionstring, your user privileges for your database, password, etc

[Tomsgu]

Maybe it can still help to somebody:

After a long time debugging I found the issue in my case. When using nginx and php-fpm owner of /var/lib/php/session folder was after installation root:apache, so session couldn't be created. Note that I haven't installed apache. (this is centos thing)

[olotintemitope]

This could also be that your app is not connecting to the database.

[COil]

One other possible reason, the linked repository to your entity doesn't reference the correct entity. Can happen when you copy/paster the code too quickly.

[youstra89]

One other possible reason, the linked repository to your entity doesn't reference the correct entity. Can happen when you copy/paster the code too quickly.

What shall we do in this case ?
I get the same error message. This happened after an update

[marcbln]

clearing the cache solved it for me.