$ drush si --existing-config
You are about to DROP all tables in your 'drupal' database. Do you want to continue? (yes/no) [yes]:
> y
[notice] Starting Drupal installation. This takes a while.
In DiscoveryTrait.php line 53:
The "group_api_ref:[CUSTOM_GROUP_PLUGIN]" plugin does not exist. Valid plugin IDs for Drupal\group\Plugin\GroupContentEnablerManager are: group_membership
Version info
name : drupal/group
descrip. : This module allows you to group users, content and other entities
keywords :
versions : * 1.3.0
name : drupal/core
descrip. : Drupal is an open source content management platform powering millions of websites and applications.
keywords :
versions : * 8.9.10
Interesting that drush si --existing-config fails but the good-old-deprecated drush si config_installer does not.
Postponed: needs info
1.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
+ drupal_flush_all_caches();
Calling flush all caches in #25 is something that should be avoid 99,9% of the times, it usually means we have no idea which caches has stale data so we have to flush them all.
Since 3 years passed and it was opened for an older major, maybe it is better to re-validate if this issue still exists and in which branches are affected.