PluginNotFoundException - MailChimp Earlier today I tried to install the MailChimp plugin for Drupal 8. I couldn't get it working properly so I decided I would just go ahead and uninstall it.
However, when I navigate to /admin/modules/uninstall I get the following error:

The website encountered an unexpected error. Please try again later.
Drupal\Component\Plugin\Exception\PluginNotFoundException: The &quot;filter_mailchimp_campaign&quot; plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager-&gt;doGetDefinition() (line 57 of core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).
Drupal\Core\Plugin\DefaultPluginManager-&gt;getDefinition('filter_mailchimp_campaign')
Drupal\filter\FilterPluginCollection-&gt;initializePlugin('filter_mailchimp_campaign')
Drupal\Component\Plugin\LazyPluginCollection-&gt;get('filter_mailchimp_campaign')
Drupal\filter\FilterPluginCollection-&gt;get('filter_mailchimp_campaign')
Drupal\filter\FilterPluginCollection-&gt;sortHelper('filter_align', 'filter_mailchimp_campaign')
uasort(Array, Array)
Drupal\Core\Plugin\DefaultLazyPluginCollection-&gt;sort()
Drupal\filter\FilterPluginCollection-&gt;sort()
Drupal\filter\Entity\FilterFormat-&gt;filters()
Drupal\filter\FilterUninstallValidator-&gt;validate('filter')
Drupal\Core\Extension\ModuleInstaller-&gt;validateUninstall(Array)
Drupal\Core\ProxyClass\Extension\ModuleInstaller-&gt;validateUninstall(Array)
Drupal\system\Form\ModulesUninstallForm-&gt;buildForm(Array, Object)
call_user_func_array(Array, Array)
Drupal\Core\Form\FormBuilder-&gt;retrieveForm('system_modules_uninstall', Object)
Drupal\Core\Form\FormBuilder-&gt;buildForm(Object, Object)
Drupal\Core\Controller\FormController-&gt;getContentResult(Object, Object)
call_user_func_array(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;Drupal\Core\EventSubscriber{closure}()
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;wrapControllerExecutionInRenderContext(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;Drupal\Core\EventSubscriber{closure}()
call_user_func_array(Object, Array)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1)
Drupal\Core\DrupalKernel-&gt;handle(Object)

Likewise, when I try and go to edit any pages content, I get the same error. This is preventing me from doing anything. I went ahead and uninstalled the plugin manually be removing all of the mailchimp files from the modules directory over FTP but I am still getting this error.
Any ideas on what I need to do to fix this? It's driving me crazy!
Thanks
I was able to fix this. I had to go into the database and manually delete the entry filter.mailchimp_campaing from the config table.