MediaWiki:Apierror-badupload
From Wicri Base 1.31
File upload parameter $1 is not a file upload; be sure to use multipart/form-data for your POST and include a filename in the Content-Disposition header.
File upload parameter $1 is not a file upload; be sure to use multipart/form-data for your POST and include a filename in the Content-Disposition header.
