The recent OAuth security fix [1] had a bug [2] which caused some
legitimate OAuth requests to be rejected. The affected versions have been
updated to work properly. Apologies for the disruption.
Gergő
https://www.mediawiki.org/wiki/User:Tgr_(WMF)
[1]
https://lists.wikimedia.org/pipermail/mediawiki-announce/2016-October/00019…
[2]
https://phabricator.wikimedia.org/T149194