Drupal 8.x

Hi all,

I have installed Drupal8 and enabled the Commerce module. I am trying to show product variants count for each product in the Product listing page. I tried to get count using result summary in the header of the view not in the fields.

Is there any way to get the just the variant count by passing product ID to views?

Upgrade from 8.4.5 to 8.5.0 failed

I upgraded my site in the usual manner. done this before with a few 8.x.x versions with success:

removed core and vendor and all files in the main directory

Copied 8.5.0 core and vendor and all files in the main directory to the old 8.4.5 place.

Then tried in the browser to https://xxx.example.com/update.php and get the errror message "The website encountered an unexpected error. Please try again later."

Sorry if this is a repeat post. I can't find a previous one.

Is there a solution for notifying users of new content in Drupal 8? The Notifications module doesn't have a D8 port, Notify is giving me errors, and the Message Stack doesn't seem to be ready for prime-time yet.

Has anyone come across a way to email users of new content?

Thanks!

Installed software with Drupal in the path like var/www/html/drupal and I want to take the drupal out of the directory structure. I moved all the contents out of Drupal and into the html directory an then made certain that apache2 pointed to the corrected path structure and it is fine. But when I want to use the tools on the management interface they all fail and want to use stuff like http://myIP/drupal/admin/structure and Drupal cannot find the page. 

I keep getting this in my logs:

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 59 of drupal-8.4.5/html/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php

Uncaught PHP Exception Drupal\\Core\\Entity\\EntityStorageException: "The "" plugin does not exist." at drupal-8.4.5/html/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php line 805.

I cannot pinpoint the cause because the $plugin_id value is empty.

How do I debug this?