Please note that some information on this wiki is still based on the demo version.
If you notice any errors, feel free to correct them.
MediaWiki:Apierror-cannot-async-upload-file
From Super Fantasy Kingdom Official Wiki
The parameters async and file cannot be combined. If you want asynchronous processing of your uploaded file, first upload it to stash (using the stash parameter) and then publish the stashed file asynchronously (using filekey and async).
