I don't know if this is general or if it's just with me but I came to update my wallpaper today and it made an error. Now my wallpaper remains as a black square just like when I tried to do the same yesterday... Can anyone tell me what's happening?

Here's the message I get:
Warning: move_uploaded_file(../../download/47572.jpg): failed to open stream: Permission denied in /home/www/minitokyo.net/web/gallery/update/index.php on line 60

Warning: move_uploaded_file(): Unable to move '/tmp/php9MYkY3' to '../../download/47572.jpg' in /home/www/minitokyo.net/web/gallery/update/index.php on line 60

Warning: imagecreatefromjpeg(../../download/47572.jpg): failed to open stream: No such file or directory in /home/www/minitokyo.net/web/gallery/update/index.php on line 73

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/www/minitokyo.net/web/gallery/update/index.php on line 75

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/www/minitokyo.net/web/gallery/update/index.php on line 78

Warning: Cannot modify header information - headers already sent by (output started at /home/www/minitokyo.net/web/gallery/update/index.php:60) in /home/www/minitokyo.net/web/gallery/update/index.php on line 83