Thread:Support/About MediaWiki:Mwe-upwiz-license-public-domain-usa-subhead/en

"MediaWiki:Mwe-upwiz-license-public-domain-usa-subhead" does not have support for, as "mwe-upwiz-license-public-domain-usa-subhead: unknown operation "sitename"" appears instead of the message in Upload Wizard (on Commons).