I'm getting an error after upgrading 1.7.6.5 -> 1.7.8.6. And the error is Address from is not submitting in checkout or in user dashboard/admin.
It shows every time in the URL after submitting /address?id_address=0 or /order?id_address=0.
And at the first after overriding the files with prestashop new version zip file, when i redirect to https://shop_url/install/upgrade/upgrade.php it show page isn't working.