Blog Avatar Error

I got this when I tried using this plugin:

Warning: mkdir() [function.mkdir]: No such file or directory in /home/content/j/o/s/joseffbhs/html/wp-content/mu-plugins/avatars.php on line 425

Warning: move_uploaded_file(/home/content/j/o/s/joseffbhs/html/wp-content/avatars/blog/c4c/HouseSoldier.jpg) [function.move-uploaded-file]: failed to open stream: No such file or directory in /home/content/j/o/s/joseffbhs/html/wp-content/mu-plugins/avatars.php on line 430

Warning: move_uploaded_file() [function.move-uploaded-file]: Unable to move '/tmp/php0vXWzZ' to '/home/content/j/o/s/joseffbhs/html/wp-content/avatars/blog/c4c/HouseSoldier.jpg' in /home/content/j/o/s/joseffbhs/html/wp-content/mu-plugins/avatars.php on line 430
There was an error uploading the file, please try again.
Warning: getimagesize(/home/content/j/o/s/joseffbhs/html/wp-content/avatars/blog/c4c/HouseSoldier.jpg) [function.getimagesize]: failed to open stream: No such file or directory in /home/content/j/o/s/joseffbhs/html/wp-content/mu-plugins/avatars.php on line 436