It seems that it is currently not possible for anybody to move gallery pages (namespace: 0), even not for admins.
I get the error message: Cannot move pages in namespace "".
when I try to do so.
Steps to Reproduce:
The move of gallery pages should be re-enabled to any users which had the permissions before, likely all autoconfirmed users, but minimum for admins.
- Wikibase prevents moving pages in namespaces related to Wikibase-provided items, properties, but also other "entities". Moving of these is handled by Wikibase (e.g. by merging functionality) instead of Mediawiki.
- The code responsible for checking whether the namespace X is handled by Wikibase uses all namespace IDs handled by Wikibase, even if the said namespace is the namespace on the other wiki (hence not relevant for the "local" wiki's moving functionality whatsoever)
- In case of Commons, Wikidata items are stored in the main namespace of Wikidata. As the code does not distinct between namespaces on different wikis, pages in the main namespace on Commons are erroneously prevent from moving.