For certain Wikidata items, it's not possible to access the entities and properties in the client via the parser function or with Lua. It says "entity not found".
https://www.wikidata.org/wiki/Q604192
https://www.wikidata.org/wiki/Q738809
Checking in the wb_entity_per_page table, these items are missing. A total of ~40,000 entities are missing from the table and thus would have the same issue. wb_entity_per_page is used in the lookup query, with a db join.
Version: master
Severity: normal