1) We have fixed warnings related to our theme files.
2) These errors appear even when the Storefront (official WC theme) was enabled and all the plugins except WC were disabled http://prntscr.com/k8uyj0 So, contact WC plugin support to find out why you have these notices.
2) Contact Pie Register author to fix this http://prntscr.com/k8v0mg
3) WooCommerce Prices By User Role plugin causes the following notices http://prntscr.com/k8v1v3 Contact plugin author to fix it.
