getCookie() always returns null

Can anybody tell me why my cookie is null ?

Cookies.setCookie(ApiParameters.LOGIN_COOKIE, sessionId, expires, null, "/", true);  String cookie = Cookies.getCookie(ApiParameters.LOGIN_COOKIE);    if(cookie == null) {      throw new RuntimeException("Cookie is 'null'.");  }

It used to work a few hours ago. Chrome says the cookie is actually there but getCookie() returns always null. What am I doing wrong here?

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