It seems like the languages that we added in https://phabricator.wikimedia.org/T260454 are failing when we try to sync saved articles.
Example call:
POST https://en.wikipedia.org/api/rest_v1/data/lists/3019748/entries/batch?csrf_token=ae44e0e813177bf78caa7b2b42928f9360511823%2B%5C
Body
{ "batch": [ { "title": "Tetanduran", "project": "https://ban.wikipedia.org" } ] }
Response
{ "type": "https://mediawiki.org/wiki/HyperSwitch/errors/bad_request", "title": "readinglists-db-error-no-such-project", "method": "post", "detail": "'https://ban.wikipedia.org' is not a recognized project.", "uri": "/en.wikipedia.org/v1/data/lists/3019748/entries/batch" }
The article still saves for offline, but it never gets stored on the server and a fresh install & resync does not restore it.
I have noticed the same POST errors for these wikis, all of which were added in T260454:
https://ban.wikipedia.org
https://mnw.wikipedia.org
https://ary.wikipedia.org
https://avk.wikipedia.org
https://nqo.wikipedia.org
https://avk.wikipedia.org
https://sat.wikipedia.org
https://hyw.wikipedia.org
Testing with iOS simulator, version 6.7.4.