As suggested by @StevenJ81 at T54971#4735320, let's try to enable property support before sitelinks here, so that "attempt to index field 'wikibase' (a nil value)" issues on every module-powered pages can be resolved.
(The linked page is a red link, and can't be created without specific priveliges.) posted locally
- Use documentation that will be provided once T202543 is closed
- Create wikibase client DB tables for incubator wiki (as defined on wikibase.git)
- Enable arbitrary access on incubator wiki