First page setup doesn't work

TLDR: mediawiki-site always lead to Main Page even when there is different config (which in my case is empty page because I use wiki in different language)

I tried change it via customize-group and use-package.
My current config:

(use-package mediawiki
  :config
  (setq mediawiki-site-alist
        '(("IT Wiki" "https://my.local.wiki/" "ao" "VerySecurePwd" nil "Random"))))