Product Data fields missing

Hi,

All the fields for Product data options are missing – Only getting simple product tab, but NO selecton, it ONLY show Simple Product with the arrow and nothing but nothing else, not even sku, regular price, sale price!!!

All the fields General, Inventory, Shipping, Linked Products, Advanced not showing.

I have reinstalled woocommerce, changed themes, unselected all the plugins, logged out and in again,rebooted computer, nothing worked to bring that section back.

Can someone please help ASAP as we cannot go on loading, I have only loaded 9 products before this happened.