jwt: "message": "Class 'Mdanter\\Ecc\\EccFactory' not found",

Got "Class 'Mdanter\\Ecc\\EccFactory' not found"

when doing

` $signer = new \Lcobucci\JWT\Signer\Ecdsa\Sha256();

    $token = (new Builder())->setIssuer('http://example.com') // Configures the issuer (iss claim)
    ->setAudience('http://example.org') // Configures the audience (aud claim)
    ->setId('4f1g23a12aa', true) // Configures the id (jti claim), replicating as a header item
    ->setIssuedAt(time()) // Configures the time that the token was issue (iat claim)
    ->setExpiration(time() + 3600) // Configures the expiration time of the token (nbf claim)
    ->set('uid', 1) // Configures a new claim, called "uid"
    ->sign($signer,  $privateKey) // creates a signature using your private key
    ->getToken(); // Retrieves the generated token`