Old error - when you can't login to the backend

[SKovbel]

I've got the old error - when you can't login to the backend.
User & Passwod are correct (when enter incorrect data system noticed me that your usr/pwd are incorrect or user is disabled). Tried login on 2 computers and 4 browsers.
Server has real domain and run under varnish.
Test version of site works fine (everything different, linux, apache, php, mysql).
Error has appeared after last upgrade.

What should i do to enter backend?

p.s.
Has Magento2 something like that?

$cookieParams = array(           
    'lifetime' => $cookie->getLifetime(),           
    'path'     => $cookie->getPath(),           
    //'domain'   => $cookie->getConfigDomain()           
    //'secure'   => $cookie->isSecure(),           
    //'httponly' => $cookie->getHttponly()       
);```

[SKovbel]

Problem disappeared after removed params

When change params back to erroneous values - error did not appear

[joanhe]

Thanks for reporting this issue. Internal ticket MAGETWO-39657 is created.

[piotrekkaminski]

We are unable to reproduce this error.