Cannot GET /catalog/product_compare/add/product/311/uenc/aHR0cDovL3d3dy5zb3JldGh1bWJyZXRyb2dhbWVzLmNvbS9kb2d6LWZhc2hpb24tZ2JhLWdiYy5odG1s/form_key/NUg7Srafy3GGqkNK/