I am getting this error when I did my OG check at facebook
https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.dreampiece.com.au%2Findex.php%3Fmain_page%3Dproduct_info%26cPath%3D2_7%26products_id%3D459
Object at URL 'http://www.dreampiece.com.au/index.php?main_page=product_info&cPath=2_7&products_id=459' of type 'product' is invalid because the given value '' for property 'og:url' could not be parsed as type 'url'.
This is my page source,
<meta property="og:type" content="product" />
<meta property="og:url" content="" />
<meta property="og:description" content=" Product Details: Total Qty: One Pc Materials: Alloy Electroplate & Rhinestones Size: Pendant - 2.5 cm x 1.6 cm; Length - 40.6 cm (Ext 7.2 cm) Country of Origin: Japan Colour: Golden " />
<meta property="og:site_name" content="DreamPiece Accessories" />
<meta property="fb:admins" content="120867161308451" />
<meta property="og:image" content="http://www.dreampiece.com.au/images/Products/m02040.jpg" />
Could it caused by the blank og:url? I am using code as below,
<meta property="og:url" content="<?php echo $canonicalLink; ?>" />