Hello,
As it happens with all wikimania wikis upon completion of the event, the wikimania2018wiki is in the process of being closed. Closing means that the wiki and its contents will continue to be online and readable by all, but account creation and editting will be restricted.
I plan to move forward and close the wiki in *one month* after the sending of this email (this is September 16, 2018 aprox.). If you have content that needs to be uploaded to the wiki, please do so.
I've setup a ticket at https://phabricator.wikimedia.org/T201188 so we can track its progress.
Of course, if you need more time I have no issues to wait. However the wiki will eventually be closed as all other wikimania wikis.
Best regards, M.