Currently the main is hardcoded to https://docs.tuleap.org/user-guide/documents-and-files/mediawiki.html
which might not be accessible in some context. The link should try to target the internal documentation that can be installed on the Tuleap instance. Tuleap will manage the redirection to docs.tuleap.org if the internal documentation is not available. The link should be https://<tuleap_instance>/doc/<shortcode_lang>/user-guide/documents-and-files/mediawiki.html
.
Also there is a typo Documenation
should be Documentation
.
https://github.com/wikimedia/mediawiki-extensions-TuleapWikiFarm/blob/7319cc3b684c000131016612994908b85645021d/content/mainpage.html#L11
BTW, it seems there is no internationalization available for this content, is it expected?