Drush/Drupal 8 is throwing errors because a theme is 'enabled' that is 'missing'. The theme is/was part of core (
test_stable), and I'm having difficulty getting it to uninstall.
I understand that the theme code needs to be there in order to uninstall, but this being core makes that difficult. I can manually place the module there locally, but would need to create a patch to actually have it installed (and then uninstalled) on the remote environments via composer.
The "Module Missing Message Fixer" module addresses this scenario with modules, but not themes.
I'm pretty sure enabling this theme in the first place was an accident. I'm hoping someone can help me determine if there is a way to do this w/out creating a patch that installs this old theme.