MediaWiki:Apierror-badupload
A fragment of the Garden of Remembering
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.
All of this has happened before, and all of this will happen again.