Thread:Project:Support desk/Uploading error

Hi all, I hope someone can help.

This error has started happening when I try to upload an image on my wiki:

--- Warning: mkdir [function.mkdir]: Permission denied in /home/pinkliza/public_html/herebemonsters.net/includes/GlobalFunctions.php on line 2176

Warning: wfMkdirParents: failed to mkdir "/home/pinkliza/public_html/herebemonsters.net/images/4/42" mode 511 in /home/pinkliza/public_html/herebemonsters.net/includes/GlobalFunctions.php on line 2179 ---

This message also appears under warnings:

Could not create directory "public/4/42".

These errors never used to happen and I found I could upload just fine. Does anyone have any idea what I need to do to fix? Thank you!