I recently upgraded a D8 site to D9 using Composer. However, I have since come across an issue when I use the site's existing Bartik theme. I have since found out that in D9, Bartik no longer extends Classy as its' base theme.
Q: For existing D8 sites that have a customised v8 Bartik theme that use Classy, how can a v8 Bartik theme be successfully transitioned to v9 (as part of the D8 -> D9 upgrade process) when Classy no longer extends? Doing a clean install of Drupal 9, there is no problems using the core Bartik theme that comes as part of the install.
I am quite unexperienced with Drupal and I need desperately to solve this problem for my customer since we cannot access the newspaper website at minhodigital.com.
I am running Drupal 7, and yesterday while trying to update the outdated modules together with the Drupal core files, everything went wrong.
Just before the site became unavailable there were error new messages popping up like "You have reached 10 remote images threshold", and some uploaded images didn't appear in the articles, even though some of them could be seen in the media library.