Magento CE 2.1 admin catalog (products) page doesn't show

[ttoman69]

Magento 2.1, PHP 56, Porto theme 2.3

Host provider automatically upgraded from 2.0.7 to 2.1. From then on admin catalog (products) page doesn't show (just endless loading sign) and can't add or edit the product, also the complete "Sales" section doesn't show, as well as "customers". And categories page freezes after the page loads all the page content.

Front-end is doing OK and it's fully operational.

1. Products -> Catalog -> Just loading mark is turning forever
2. Same for "Sales" and "Customers"
3. Products -> Categories -> Loads the contents and then frezzes.

Expected result

1. Should show a table (list) with all the products in an admin catalog (products) page

Actual result

1. Empty admin catalog page with just "Catalog" header and turning"loading" sign. Like the page has freezed.

Before 2.1. the admin back-end was OK.

Thank you very much
Tom

[ttoman69]

Sorry. Not a bug.
After erasing my FireFox cache everything is OK. I'll bury myself in the ground double blush

Have a great day and sorry for this one.
Tom