I just attempted to update Drupal 9.2.10 to 9.3.0 using composer and received the following error during the database update.
Failed: Drupal\Component\Plugin\Exception\PluginNotFoundException: The "tag" plugin does not exist. Valid plugin IDs for Drupal\views\Plugin\ViewsPluginManager are: in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 53 of /path/to/home/dir/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).
I've used composer to install everything for quite some time now, and up until now everything has run just fine.
Upon further inspection into this error, I noticed that the installation doesn't even have the
DiscoveryTrait.php file that is included in the Core 9.3.0 zip.
Furthermore, the installation is a rather complex multi-site install.
What, if any, ramifications would I encounter by copying some of the files from the zip to my local and pushing the changes via git?
Would I need to keep installing this file manually since it doesn't seem to be included in the composer package?
Lastly, why wouldn't this file had been installed after having run the
composer update "drupal/*" -w command?
I guess I'm mostly concerned about what other files may be missing from the core at this point too...