MediaWiki talk:Titleblacklist-forbidden-upload/sandbox

 on the local or global blacklist. Please choose a different filename and try again. Make sure the filename you chose matches the naming convention at File names.

If you believe that you are seeing this message in error, please let us know at Administrators' noticeboard. Be sure to specify the exact name of the file you are trying to upload, as well as a brief explanation of what you are trying to do. Thank you.