Upgrading Drupal

Hi,

I update my core from 8.7 and it broke search API.  I removed search_api module however there is still a reference I cannot find causing this error every time I try and clear the cache.  Anyone have any idea where this value is stored?  I scoured MySQL and unix 

>drush cr

In DiscoveryTrait.php line 53:

The "search_api" plugin does not exist. Valid plugin IDs for Drupal\views\Plugin\ViewsPluginManager

Anyone know how to surgically remove this?  Where does this list of supported plugin_id's come from?

Thank you (now bald) Andrew

I am trying to update the Core from 8.9.10 to 8.9.11 using Composer. When I type any composer command an error message returns,

I have a well running D7 sit at theorichel.nl. I want to upgrade to D8 and I understand that I should first create a D8 site without the data. Where do I do that? Should I ask my host for a new address and then delete the old site after miogration or can I install D8 somewhere in the folder tree that also contains my D7 site?

Hi,

@ /update.php, I see a message:

Cache Expiration - hook status    No expirable cache enabled
None of the enabled modules implements hook_expire_cache(). This means that expire.module will not be having any effect. You should enable a module implements this hook, like the Varnish module.

When I installed than activated Varnish module it broke my site with a white screen.

Is there a simpler method for resolving this message?

Thanks,

Steve

Folks,

I know, this is a long shot.  10 years ago I build a pretty extensive store (www.JudaicArtStudio.com) using v6.  It has worked adequately but has now run into problems with Webform not sending out emails.

In addition, most of the modules I used are no longer even available for download, and there are a few security updates pending.