Making a wrong request to the API returns 'badvalue' in the request header. It is described one the API page of Wikidata that the Request Header includes "MediaWiki-API-Error", but the error code 'badvalue' is not documented.
Replicate it:
api.php?action=blub&languages=en&ids=Q42&format=json
I am getting error whenever I am trying to access api.php from Version Entry point URLs. My error "Failed to load resource: the server responded with a status of 500 (Internal Server Error)".
mediawiki: 1.37.1,
php: 7.4.28 (apache2handler) by XAMPP
database: mysql
How to resolve the issue. I am a fresher in mediawiki