Yes I had the same problem, I was unable access my Homepage, or when I was logged in as admin I was not able to go to Pages/All Pages and I got the same error:
Fatal error: Call to undefined function is_product() in /home/content/p/b/c/pbchoice/html/wp-content/plugins/woocommerce-dynamic-gallery/admin/wc_gallery_woocommerce_admin.php on line 57
I Deactivated woocommerce-dynamic-gallery.
