After updating to Nova 3.8, ID Field disappeared from Index View

we've just updated to Laravel Nova version 3.8, but this caused that the ID fields have disappeared from the indexes (the list views):

        ID::make('ID', 'idcontact')->sortable(),

It's like that the column is visible, but the actual ID number is not there:

Solution

Refering to Nova Upgrade Guide:

After updating to a new Nova release, you should be sure to update Nova's JavaScript and CSS assets using nova:publish and clear any cached views with view:clear. This will ensure the newly-updated Nova version is using the latest versions.

php artisan nova:publish
php artisan view:clear

Did the trick for me, hope it helps!