Confirming (a) that I can replicate the issue following Suffusion's report above, and (b) I encountered the issue "in the wild" when attempting to vote. I use iOS, Chrome, and the Monobook (responsive) skin for what it's worth. I was able to vote by changing back to the desktop view on VoteWiki IIRC.
Wed, Nov 24
Sep 23 2021
I don't believe it actually uses the preferencestoken either - the change to the API certainly doesn't appear to have broken anything. I'll submit a patch to remove the retrieval.
Aug 19 2021
Hello! Closing this as resolved as I am still maintaining this and there's no point having this task open.
Aug 6 2021
Mar 7 2021
For what it's worth, this bug breaks the current implementation of FireflyBot's task 11 - notifying authors of drafts on enwiki that they are coming up to the point where they can be deleted. I realise that's a very small matter in the grand scheme of things, and I can rework the implementation around this bug, but thought it worth noting that the bug has "real-world" consequences, even if very tiny ones.
Jul 1 2018
May 14 2018
@Peachey88 Yep, that's the method I used to create the account.
May 13 2018
Should the Wikitech account have been created automatically? The instructions don't specify creating one manually...