Default logo does not display
Please go to Settings > Theme and scroll down to logo. Change the logo URL to point to your own logo (eg: http://yourwebsite.com/logo.png).
If you wish to use the default logo you can try changing the logo path to a full URL like this: http://yourwebsite.com/clientarea/images/logo.png or if your installation directory is "/clientarea/" then change the logo path to "/clientarea/images/logo.png"