Hi Jiri,
I have opened a case: Case #708754 - "Webrecorder can't record"
That's correct it's an internal site. I'm not getting the option to provide an login name or password.
I am getting a message: "Element for last action was not found on the page. Do you want to skip this action and try to continue?" yes don't work and no "Playback failed: Element for last action was not found on the page".