You need to have the absolute URL in your image src attribute.
If you just put the relative path, it will work on your website, but the PDF creation system won't be able to load the image and will display that error.
For the shipping address, it seems that there is a typo in the invoice. Please change the line:
$addresses = array('billing_address','shopping_address');
to:
$addresses = array('billing_address','shipping_address');
in the file plugins/hikashop/attachinvoice/attachinvoice/invoice.php and that should solve the problem.