Hi Laranz.
Thanks for you response.
today we returned to a backup of the previous stable version (theme 2.8 and woocommerce 2.6):
we installed version 3.1 of the theme with woocomerce 3.1.2 and failed.
Can you try to migrate?
We have a site backup where there are no problems if the base is corrupted.
We thank you for the urgency as it is a sales site.
Regards.