OAuth isAllowedToAuthenticate() on null exception

[AndBlazing]

Hey folks,

 

I'm getting the exception if click on Cancel or Return to button (http://prnt.sc/dxc782, http://prnt.sc/dxc6pr). Probably it's because of misconfiguration or something, although that seems to be cofigured properly.

 

if (function_exists('mcrypt_create_iv')) {
   $app['session']->set('oauth_token', bin2hex(mcrypt_create_iv(32, MCRYPT_DEV_URANDOM)));
} else {
   $app['session']->set('oauth_token', bin2hex(openssl_random_pseudo_bytes(32)));
}

$url = WHMCS_PATH . "oauth/authorize.php?client_id=" . WHMCS_CLIENT .
       "&response_type=code" .
       "&scope=openid%20profile%20email" .
       "&redirect_uri=" . $app['url_generator']->generate('oauth_code', [], UrlGenerator::ABSOLUTE_URL) .
       "&state=security_token%3D" . $app['session']->get('oauth_token') . "%26url%3D" . $app['url_generator']->generate('dashboard', [], UrlGenerator::ABSOLUTE_URL);;
return new RedirectResponse($url);

 

Could you advice please where is better to dig?