Smart Product Ciewer conflict with WooCommerce Multilingual

I notice the following case, in order to know if someone of you have already find or fixed somethign similar for eventual suggest (thanks)

WordPress 4.7.4
XStore last version
WooCommerce Multilingual Version 4.1.2 *WPML package with regular licence
Woocommerce Version 3.0.5

Problem > using product data > Attributes > if I have woocommerce multilingual active, I can not add attributes and I see this error https://www.dropbox.com/s/9lpvi1i7qltqngy/fatal%20error%20woocommerce%20multilingual.png?dl=0
I have other stores where I do not use Xstore, and the few plugs that I use run fine.
So I was sure it was circoscripted to XStore package.

Solution: activating/deactivating one by one all the modules provided with Xstore, I find a solution of the conflict by deactivating Smart Product Viewer.

I really would like to use it anyway, so if someone of you has some suggest about hot to fix, I would like to try.

Thank you in advance.