Error with Image on Login Screen with Branding Plugin

When I go to the login screen of any website on my multisite I receive this error above the login area:

Warning: getimagesize() [function.getimagesize]: URL file-access is disabled in the server configuration in /home/content/50/7025550/html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 121

Warning: getimagesize(http://alivepublications.org/wp-content/uploads/ultimate-branding/includes/login-image/login-form-image.png) [function.getimagesize]: failed to open stream: no suitable wrapper could be found in /home/content/50/7025550/html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/login-image.php on line 121