Cannot find the "nelmio_security.csp_reporter_controller" controller. about nelmiosecuritybundle HOT 8 CLOSED

nelmio_security:
    path:     /nelmio/csp/report
    defaults: { _controller: nelmio_security.csp_reporter_controller:indexAction }
    methods:  [POST]

# Nelmio Security Bundle Configuration
nelmio_security:
    # signs/verifies all cookies
#    signed_cookie:
#        names: ['*']
#        secret: secret # defaults to global %secret% parameter
#        hash_algo: sha512
    # encrypt all cookies
#    encrypted_cookie:
#        names: ['*']
#        secret: secret
#        algorithm: rijndael-256
    # prevents framing of the entire site
    clickjacking:
        paths:
            '^/.*': DENY
    # prevents redirections outside the website's domain
    external_redirects:
        log: true
        override: homepage

    # prevents inline scripts, unsafe eval, external scripts/images/styles/frames, etc
    csp:
        report_uri: /nelmio/csp/report
        report_only: false
        default: [ self ]
        frame: [ 'https://www.youtube.com' ]
        script:
            - self
            - 'https://www.google-analytics.com'
            - 'http://www.google-analytics.com'

    # disables content type sniffing for script resources
    content_type:
        nosniff: true

    # forced HTTPS handling, don't combine with flexible mode
    # and make sure you have SSL working on your site before enabling this
#    forced_ssl:
#        hsts_max_age: 2592000 # 30 days
#        hsts_subdomains: true

    # flexible HTTPS handling, read the detailed config info
    # and make sure you have SSL working on your site before enabling this
#    flexible_ssl:
#        cookie_name: auth
#        unsecured_logout: false

nelmio_security:
    path:     /nelmio/csp/report
    defaults: { _controller: nelmio_security.csp_reporter_controller:indexAction }
    methods:  [POST]