> > 10:32:50        Error:  "Authorization Required"
> > (401) at link <https://site/twiki/bin/rss> (from
> >
> <https://myname:password@site/twiki/bin/viewauth/MyWi>
> 
> > ki)
> 
> HTTrack Help: Authentication
> <http://httrack.kauler.com/help/Authentication>

Read that.
 
> Probably a form on the log in page.

No form, but plain twiki.

> Can't use capture method with httpS

That may be the problem! What's the issue with that?
> You didn't filter out the log-out url

There's no logout-URL.

Thanks for the hints so far!