13 hours ago, Arisbel Gonzalez said:
As for Merchant Center. Goolge have one specify file structure, so each and every module need to generate similar feed file to meet req. Most probably you missing something like EAN's, shipping costs etc.
As for FB. Module should generate feed file with most probably link to it i.e yourdomain.com/gm_shop1_lang2.xml and this one you need to place in FB store data.