Thread:Extension talk:Wikibase Client/Wikibase Client installation/reply

Do you have Wikibase Repo enabled somewhere? Wikibase Client cannot access wikidata.org, except for within wikimedia servers where the wikidata clients (e.g. wikipedia) are able to access the wikidata database directly. If you have your own Wikibase Repo instance, then update repoUrl and double check the repoDatabase setting (e.g. do you really intend it to be different from changesDatabase?). Cheers.