I understand, but still no luck.
1/ added in my plugin
function onMarketAclPluginListing(&$categories) {
var_dump($categories);die;
// Your plugin can interact with product editing in the front-end.
$categories['product'][] = 'productextrafieldck';
}
>> does nothing even if it should die the page
2/ tried to remove the condition "if(hikamarket::acl('product_edit_plugin')) {" in the form.php, then my plugin works !
So I think that there is a problem with the ACL. I have no idea where to look at ...