Thread:Project:Support desk/Unable to create the folder "mwstore://local-backend/local-public/f/fc"/reply

HI, you can reference this: http://www.mediawiki.org/wiki/Thread:Project:Support_desk/Trouble_uploading_after_installation

I encountered the same thing, and i found the link above. Finally i solved this by: sudo chown -R www-data mediawiki

Actually we can only "chown" the exact directory for images: sudo chown -R www-data mediawiki/images/

Hope this can help you.