Dear Spametki, +1 for me. I followed your directions and got a 401 at

After investigating the link you provided I tried to authorized my account in "wiki_editor" group. However, in db Table auth_group there was only 1 entry == user_1.

Any ideas?

This might be a security/user rights problem. There were changes lately in the way auth.wiki manages permissions. For editing wiki data, the logged in user must have a editors group membership (or equivalent access control configuration). The auth.wiki feature is still experimental. There's a similar problem posted in the users group:

https://groups.google.com/d/topic/web2py/KLQ-LCsxGB4/discussion