So I installed Magento 2.0.6 + sample data on my Ubuntu machine and tried to export the product database into a CSV file but I'm getting 'Please enter a correct entity model.' although I select 'Products' as entity type.
This also happens with the other 3 selectable options - Advanced pricing, Customer main file and Customer addresses.
Any ideas how to fix it?
I've had the same issue, and I'm not sure how to fix it in Magento 2. However, you can use this Free Product Exporter Script for Magento 2.x to get a CSV file of all the product data.