can't do massive action "Update attributes" because the page it's blank! it appears like this:
previously, I select a group of products and click on 'actions'
Magento ver. 2.2.11
There might be some error.
Enable the error reporting in the following file.
Un-comment the below line.
I hope it will help you for find the error and fix it!
go to config section "Stores->Configuration->Catalog->Inventory"
set "Minimum Qty Allowed in Shopping Cart" to to 1 for "ALL GROUPS" and save config